This standard specifies the principles of groundwater resource classification and grading, as well as the names, definitions, classification conditions, uses and codes of categories and grades. This standard applies to all stages of groundwater resource exploration and is an important basis for the preparation of design documents, project deployment, calculation of groundwater resource quantities, and report writing at each exploration stage. It is also an important basis for the approval and statistics of groundwater resource quantities; the establishment and design of water source projects, and the preparation of groundwater exploitation plans and plans. GB 15218-1994 Groundwater Resource Classification and Grading Standard GB15218-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Standards of classification for groundwater resources
Standards of classification for groundwater resources1Subject content and scope of application
GB 15218 --- 94
1.1This standard specifies the principles of classification and classification of groundwater resources, as well as the names, definitions, division conditions, uses and codes of categories and levels. 1.2This standard applies to all stages of groundwater resource exploration and is an important basis for the preparation of design documents, work deployment, groundwater resource quantity and report compilation at each exploration stage, as well as an important basis for the approval and statistics of groundwater resource construction, the establishment and design of water source projects, and the formulation of groundwater development plans and planning.
2 Referenced standards
G35084 Water quality standard for farmland irrigation
GB35749 Sanitary standard for drinking water
GB8170 Rules for numerical rounding
G1313908 General rules for geological exploration of solid minerals GBJ27 Specification for hydrogeological exploration of water supply
3 General rules
3.1 This standard is formulated to meet the needs of groundwater resource classification and grading in groundwater resource exploration design, report writing, approval, statistics, water source project establishment and design, national economic planning, and water resource exploitation and allocation. 3.2 The principles for formulating this classification and grading are: based on the characteristics of groundwater resources, while considering the feasibility of current technical, economic and environmental aspects of groundwater exploitation in my country; the differences in the uses of groundwater resources at different levels; the correspondence with the exploration stage and the engineering design stage; the consistency with other mineral resource classifications; the operability of practical application; the inheritance of my country's past classifications and gradings, and the feasibility of international classifications and gradings.
3.3 Based on the current technical and economic conditions for groundwater exploitation in China and the provisions of current laws and regulations, and considering the needs and possibilities of long-term development, groundwater resources are divided into two categories: groundwater resources that can be utilized and groundwater resources that are still difficult to utilize. Allowable exploitation resources and usable groundwater resources are synonymous. Allowable exploitation volume is the abbreviation of the amount of resources that can be exploited. 3.4 Based on the different degrees of exploration and research, the allowable exploitation base is divided into 5 levels, represented by the uppercase English letters A, 1C, D, and E: Resources that are still difficult to utilize can be divided into 3 levels, represented by the English letters Cat, Dd, and Ed. Among them, A, B, C, Cd are proven resources, D, Dd are inferred resources, and E, Ed are predicted resources. The classification and grading of groundwater resources are shown in Table 1. Approved by the State Bureau of Technical Supervision on September 24, 1994 and implemented on August 1, 1995
Usable resources
(Allowable mining resources)
Resources that are still difficult to use
GB15218-94
Table 1 Classification and grading table of groundwater resources
Total base of groundwater resources
Proven resources
3.5 The level of groundwater resources basically corresponds to the exploration stage. 3
Inferred resources
For the expansion exploration report of water source, mainly the A-level permitted mining volume shall be submitted, and part of the B-level permitted mining volume may also be submitted. For the exploration report of water source, mainly the B-level permitted mining volume shall be submitted, and part of the A-level and C-level permitted mining volume may also be submitted. Predicted resources
Detailed water source survey report or regional hydrogeological survey report, mainly submit (level allowable extraction volume, and can also submit part of the D level allowable extraction volume and Cd, Dd level groundwater resources that are still difficult to use. Water source survey report or regional hydrogeological survey report can submit different categories of D and E level groundwater resources. Regional hydrogeological survey report can submit different categories of F level groundwater resources. Regional groundwater resource evaluation report can summarize and submit various levels of A, B, C, I, E groundwater allowable extraction volume and difficult-to-use resources according to actual conditions.
3.6 Allowable extraction volume is the main result of various exploration and evaluation reports. Water supply resource allocation, water source construction project establishment, design and formulation of national economic plan for the use of A, B, C level groundwater allowable extraction volume The extraction volume and its exploration and evaluation reports shall be subject to approval in accordance with the law. 3.7 In the same hydrogeological unit, if it contains several water sources with hydraulic connection or recharge relationship, the sum of the allowable extraction volume of each water source shall not be greater than the allowable extraction volume of the unit. 3.8 The evaluation of groundwater resources in the district may be carried out every 5 to 10 years according to the needs of economic construction and the improvement of groundwater exploration, development and utilization. The amount of groundwater resources of various categories and levels shall be subject to the final approval. 3.9 The units of allowable groundwater extraction volume and resource volume are m/d and m/a. The units of allowable extraction volume and resource volume of springs (including underground rivers, the same below) can also be measured in m/s. 3.10 According to the accuracy of the original test data, the calculated hydrogeological parameters, allowable groundwater extraction volume and the amount of resources that are still difficult to utilize, Rounded to 3 or 2 significant digits.
4 Classification of groundwater resources
4.1 Groundwater resources are divided into two categories: resources that are permitted for exploitation and resources that are difficult to exploit. 4.2 Resources that are permitted for exploitation are groundwater resources with practical economic significance. That is, through technically and economically reasonable water-taking structures, the water output will not decrease during the entire exploitation period, the dynamic water level will not exceed the design requirements, the water quality and water temperature changes are within the allowable range, and the normal exploitation of the built water source will not be affected. No harmful environmental geological problems will occur and the provisions of current laws and regulations are met. The groundwater resources can be obtained from the hydrogeological single light or water source.
4.3 Resources that are difficult to exploit are groundwater resources with potential economic significance. It means that under the current technical and economic conditions, the exploitation of groundwater in -…areas will be in the technical, There are insurmountable problems and restrictions in economic, environmental or regulatory aspects, and the groundwater resources are currently difficult to use. These problems include: limited groundwater recharge and storage resources, and the water output cannot be guaranteed during the entire mining period; the location of the well-suitable area or water source is remote, and the water transfer project is too expensive; the aquifer is buried too deep, and the cost of constructing a well is too high; the water conductivity of the aquifer is extremely uneven, and the success rate of constructing a well is too low; the groundwater level is buried too deep, making it difficult or uneconomical to extract water; the water conductivity of the aquifer is too poor, and the water output of a single well is too small; the water quality or water temperature of the groundwater does not meet the requirements; the new water source will have a significant impact on the water extraction toe or spring flow site of the original water source: after groundwater extraction, harmful environmental geological problems will occur; the construction of water intake structures has insurmountable problems or restrictions in geology or regulations, etc.
C and DE level groundwater resources with one or more of the above problems are the resources of d, Dd, and Ed levels that are still difficult to use. 5 Classification of groundwater resources
GB 15218-94
5.1 The classification of groundwater resources should be analyzed and determined according to the following four contents: exploration stage; hydrogeological research degree; groundwater resource research degree; exploitation technical and economic conditions research degree. The different exploration and research degrees determine the level and application scope of groundwater resources.
5.2 Class A allowable exploitation volume:
5.2.1 Exploration stage: Class A allowable exploitation volume is the required exploitation volume submitted in the water source expansion exploration report. The scale of the water source hydrogeological map is generally 1:10,000 or 1:25,000. Class A allowable exploitation volume is also the groundwater allowable exploitation volume verified by many years of exploitation. The national, provincial, administrative region, municipality or economic zone groundwater resource evaluation report and the scale of the hydrogeological map are determined according to the actual requirements. 5.2.2 Hydrogeological research degree: Based on the investigation of water sources and continuous development for more than 3 years, as well as the dynamic observation of water level, extraction volume and water quality, special research or exploration tests have been conducted on water balance and existing problems. For water sources that directly use spring water sources (referred to as spring water sources), on the basis of ascertaining the conditions of recharge, runoff and discharge, the extraction volume of previous years and precipitation observation data for more than 30 years and spring flow and water quality observation data for more than 15 years should be mastered. Regional groundwater resource evaluation work should be based on hydrogeological units, fully collect and analyze existing meteorological, hydrological and hydrogeological data, use measurement methods to measure groundwater extraction volume, and study and master the continuous extraction volume and dynamic change data of groundwater for more than 3 years. 5.2.3 Research degree of allowable extraction volume: Based on the continuous extraction and dynamic observation data of more than 3 years in decentralized and centralized water sources.Based on the hydrogeological unit, the permissible groundwater extraction volume is systematically calculated for many years, related analysis and evaluation are carried out, and the mathematical model of the groundwater seepage field is further revised and improved. In the case of obvious changes in water quality, the mathematical model of the groundwater solute concentration field should also be established. For spring water sources, spectrum and frequency analysis and calculation should be carried out based on the observation data of spring water flow for more than 15 consecutive years, and the regression equation or mathematical expression related to spring water flow and multi-year precipitation should be established to calculate the permissible extraction volume and its error at different guarantee rates. Under the condition that the hydrogeological conditions are difficult to ascertain or have not yet been ascertained, continuous exploitation for more than 5 years, the dynamics tend to be stable, and the actual extraction volume of measurement statistics can meet the accuracy requirements of Class A permissible extraction volume. 5.2.4 Research degree of technical and economic conditions for exploitation: Based on the practice of many years of exploitation in decentralized and centralized water sources or spring water sources and the dynamic observation data of groundwater, a special study is conducted on the environmental geological problems that arise during the exploitation process. When necessary, appropriate exploration work is arranged, and specific plans and measures for water source construction, expansion, adjustment of exploitation layout, environmental protection and rational exploitation of groundwater resources are proposed. Delineate the Wei Niu protection area of ​​the water source. Evaluate the economic conditions of groundwater exploitation. 5.2.5 Scope of application:
, can be used as the basis for the allocation and management of the annual national economic plan. b, can be used as the basis for the reasonable exploitation of water sources and the design of reconstruction and expansion projects. 5.3 Class B allowable exploitation volume:
5.3.1 Exploration stage: Class B allowable exploitation volume is the main allowable exploitation volume submitted in the water source exploration report. The scale of the hydrogeological map of the water source is generally 1:10,000 or 1:25.
5.3.2 Degree of hydrogeological research: For the water sources that have passed the detailed investigation or have been selected, further arrange some exploration projects and hydrogeological tests. Carry out groundwater dynamic observation for more than 1 year. Carry out special research on some key issues, find out the hydrogeology and boundary conditions of the water source, and establish a hydrogeological conceptual model including complete hydrogeological units. A detailed investigation and statistical analysis of the current status of groundwater exploitation was carried out. Under the condition that the hydrogeological conditions are complex and the water cushion is close to the allowable extraction volume, a large flow and long-term group well extraction test should be carried out to verify the understanding of boundary conditions and the reliability of parameters. For spring water sources, its recharge, runoff and discharge conditions should be found out, the extraction volume over the years should be mastered, and dynamic observation of water quantity and water quality should be carried out for more than 10 years. If there are more than 30 years of precipitation observation data, spring water flow observation data in consecutive dry years, or historical special viscosity flow data, the spring water observation series can be shortened appropriately. 5.3.3 Research degree of allowable extraction volume: On the basis of finding out the groundwater recharge, runoff, discharge and boundary conditions, single-hole pumping test with observation hole, groundwater dynamic observation, field and laboratory testing and other methods are used to calculate the hydrogeological parameters of different partitions within the groundwater flow field. According to the hydrogeological conceptual model, a groundwater mathematical model solved by equilibrium method, numerical method, etc. is established. The palace adopts two or two appropriate methods based on 10
GB15218--94
, combined with different exploitation schemes and dry year combination series, to calculate and compare the allowable exploitation of water sources, and predict the possible changes in groundwater level, water volume and water quality during groundwater exploitation. In the case that the water quality may change significantly, it is advisable to establish a mathematical model of the groundwater solute concentration field. According to the changes in precipitation over many years and the regulation and storage capacity of the aquifer, the allowable exploitation volume of the water source is evaluated according to the required guarantee rate. For spring water sources, frequency analysis should be carried out based on the observation of spring water flow over many years and access data, and the allowable exploitation volume at different guarantee rates should be calculated. Based on the observation data of multi-year average precipitation and spring flow, multiple regression and system theory analysis and calculation can be carried out to establish the regression equation and mathematical expression related to spring flow and multi-year precipitation, predict the allowable extraction volume of spring water, evaluate the possible errors in the forecast, and in the case of complex hydrogeological conditions or water demand significantly less than the allowable extraction volume, the stable water output of group or single pumping test in the dry season of the former and the normal water season of the latter can meet the accuracy requirements of Class B allowable extraction volume. 5.3.4 Research degree of technical and economic conditions of extraction: Through simulation and trial calculation and other methods, propose and demonstrate the optimal extraction plan for the water source. Predict the environmental geological problems that may occur within the influence range of the water source due to long-term groundwater extraction, as well as the location and severity of their occurrence. Demonstrate the impact of long-term extraction of the water source on nearby water sources, springs and surface water bodies. Determine the plan for establishing spring chambers or well extraction at the spring water source based on drilling and pumping test data. Delineate the sanitary protection zone of the water source. Evaluate the economic conditions for groundwater or spring extraction. 5.3.5 Scope of application:
It can be used as the basis for the design of water source and its main engineering construction. 5.4 Class C allowable exploitation volume and resources that are still difficult to use 5.4.1 Exploration stage: Class C allowable exploitation volume is the main resource volume submitted in the detailed investigation report of the water source or the detailed investigation report of the regional hydrogeology. The scales of the hydrogeological map are generally 1:25,000 and 1:50,000 respectively. 5.4.2 Degree of hydrogeological research: Through hydrogeological mapping, geophysical prospecting, single-hole pumping test, single-hole pumping test with observation hole, water quality analysis, including groundwater dynamic observation for more than half a year during the dry season, the spatial distribution, hydraulic connection, water conductivity, water quality characteristics and boundary conditions of the main aquifers are basically identified. The recharge, runoff and discharge conditions of groundwater are basically mastered. The current status, planning and existing problems of groundwater development and utilization are investigated and understood in detail. For spring water sources, its recharge, runoff and discharge conditions should be preliminarily identified, the annual extraction volume should be mastered, and the water volume and water quality dynamic observation work should be carried out for more than 3 years. If there are more than 30 years of precipitation observation data, continuous dry years spring flow observation data or historical extremely dry flow data, the spring observation series can be appropriately shortened. 5.4.3 Research degree of allowable extraction volume and difficult-to-use resource volume: On the basis of basically identifying groundwater recharge, runoff, discharge and boundary conditions, single-hole pumping test with observation holes, groundwater dynamic observation and laboratory test data are used to calculate hydrogeological parameters. Select one or more appropriate methods such as equilibrium method, analytical method, numerical method, etc., combined with the extraction plan, to make a preliminary calculation of the allowable extraction volume and difficult-to-use resource volume of the water source.
For spring water sources, the relationship between precipitation and spring flow should be found out based on its recharge, runoff and discharge conditions through mathematical and statistical methods, and the allowable extraction volume of spring water or difficult-to-use resource volume should be preliminarily determined. In the case of complex hydrogeological conditions or water demand significantly less than the allowable extraction volume, the recharge resources, storage resources and allowable errors are considered, and the water output appropriately extrapolated from the relationship curve between the water output and the depth drop in the group or single well pumping test can meet the accuracy requirements of the allowable extraction volume of the first level.
5.4.4 Research degree of technical and economic conditions for extraction: Based on the hydrogeological conditions, drilling and single-hole pumping test results with observation holes, suggestions are made on the well depth, well diameter, number of wells, water pumps and well arrangement. Environmental geological problems that may arise from groundwater extraction are demonstrated and evaluated. Among the several water sources that have been investigated in detail, water sources worthy of further exploration are determined based on the hydrogeological conditions and water use needs. Based on drilling, pumping test or geophysical data, a preliminary plan for establishing a spring chamber or well extraction in the spring water source is proposed. The sanitary protection zone of the water source is preliminarily delineated. A preliminary evaluation is made on the economic conditions for groundwater or spring water extraction.5.4.5 Scope of application:
It can be used as the basis for the overall planning of water supply for towns, factories and mines or the decentralized development and utilization of groundwater for agriculture and animal husbandry at the county level; a.
b. It can be used as the basis for the feasibility study of water sources and their main projects; it can be used as the basis for the preparation of water source exploration design documents: c.
CB15218---94
d. When the hydrogeological conditions are very complex and the allowable exploitation volume of Class B cannot be determined after exploration, the allowable exploitation volume of Class C groundwater can be used as the basis for trial mining;
e. When the water demand is significantly less than the allowable exploitation volume, the allowable exploitation volume of Class C groundwater can also be used as the basis for the construction design of water sources.
5.5 Allowable exploitation volume of Class D and resources that are still difficult to use: 5.5.1 Exploration stage: The allowable exploitation volume of Class D and resources that are still difficult to use are the main resources submitted in the regional hydrogeological survey report or water source survey report. The scales of hydrogeological maps are generally 1:20 square meters and 1:50,000 respectively. 5.5.2. Hydrogeological research level: Based on the collection of existing meteorological, hydrological, regional geological and other data, conduct hydrogeological or geological and hydrogeological comprehensive mapping, preliminarily identify the burial conditions, distribution patterns, water-richness, water quality types, and dynamic patterns of the main aquifers in the area, and circle out the suitable well areas. Select representative favorable mining areas to conduct geophysical exploration and individual single-hole pumping tests. For springs that can be used as water sources, preliminarily analyze their recharge, runoff, and discharge conditions, visit their mining conditions and dynamic changes, and obtain flow observations and water quality analysis data for more than one year in the wet and dry seasons. 5.5.3 Research level of the allowable mining volume and the resource base that is still difficult to use: Based on the preliminary identification of groundwater recharge, runoff, and discharge conditions, use the data and parameters obtained from geophysical exploration and single-hole pumping tests, and select appropriate calculation methods such as equilibrium method and analytical method to make a rough calculation of the resource volume of the region or water source.
For the lower spring water source, the allowable extraction volume of spring water should be determined based on its recharge, runoff, discharge conditions, multi-year meteorological observation data, flow dynamic access data and half- and dry season flow observation results for more than one year. 5.5.4 Research degree of technical and economic conditions for extraction: Make a preliminary evaluation of the technical and economic conditions for groundwater extraction and the environmental geological problems that may arise from groundwater extraction based on the hydrogeological conditions of the region and the water source, geophysical exploration and single-hole pumping test results. 5.5.5 Scope of application:
a: It can be used as the basis for the formulation of agricultural zoning or water conservancy construction, industrial layout and other plans at the provincial, municipal, autonomous region and prefecture and city levels; b. It can be used as the basis for the preparation of regional hydrogeological detailed investigation or water source detailed investigation design; c. It can be used as the basis for preliminary feasibility study of water sources and their main projects. 5.6E-level allowable exploitation volume and resources that are still difficult to use: 5.6.1 Exploration stage: E-level allowable exploitation volume and resources that are still difficult to use are the main resources submitted in the regional hydrogeological survey report. The scale of the hydrogeological map is generally 1:500,000. 5.6.2 Hydrogeological research level: Based on the existing regional natural geography, regional geology and a small amount of private well data, using existing geological maps and aerial satellite films, some route surveys are carried out to make a rough inference of the regional groundwater burial conditions, distribution and water conductivity of the aquifer, and circle out the well-suitable area or water-rich section. Its main aquifer is not revealed by pipe wells or boreholes. Springs that can be used as water sources have one or more measured flow and water quality analysis data. 5.6.3 Research level of allowable exploitation volume and resources that are still difficult to use: Using empirical parameters, based on many years of meteorological and hydrological data, combined with geological and geomorphological conditions, simple methods such as equilibrium method and analogy method are used to make a rough estimate of the groundwater resources in the region and well-suitable areas. 5.6.4 Research degree of technical and economic conditions for exploitation: Based on the regional hydrogeological conditions, make a rough evaluation of the technical and economic conditions for groundwater exploitation and the environmental geological problems that may arise from groundwater exploitation. 5.6.5 Scope of application;
a. It can be used as the basis for national or regional long-term planning and agricultural zoning; h. It can be used as the basis for compiling regional hydrogeological surveys or water source survey designs. 12
GB 15218-94
Appendix A
Explanation of the wordings used in this standard for the degree of strictness (supplement)
The following explanation is given for the wordings used in the provisions of this standard for the degree of strictness required, so as to distinguish them in implementation. Wordings that indicate that it is very strict, there is no room for choice, and it is necessary to do so: A1
Positive words use "must",
negative words use "strictly prohibited".
A2 indicates strictness, and the words that should be used in general are: "should" is used for positive words;
"should not" or "must not" are used for negative words. A3
indicates that a slight choice is allowed, and the words that should be used first when conditions permit are: "should" or "may" are used for positive words;
"should not" is used for negative words.
Appendix B
Comparison table of groundwater and mineral resource classification at home and abroad (reference)
(This standard) Groundwater resource classification and classification standard 1994
Mineral resource classification and classification standard (submitted for review
draft) 1993
Specifications for hydrogeological survey for water supply
GBJ27-88
Interim specifications for hydrogeological survey for urban water supply of the Ministry of Geology 1960||tt ||Recoverable reserves and forecasts of groundwater in the former Soviet Union
Classification of resources 1983
Classification of mineral resources in the United States 1980
Classification of mineral resources in the British and American industrial circles
Classification of mineral resources in the United Nations 1979
Proven resources
Proven resources
Proven reserves
Measured
Proved mineral reserves
proved ore
indicated
probable ore
inferred resources
inferred resources
estimated reserves
inferred
possible ore
mineral resources of economic significance in the next few decadesR-1
predicted resources
predicted resources
predicted resources
thetical
specu-
lative
potential ore
laient orr
GB 15218-94
Appendix C
Allowable error of groundwater extraction volume at different levels (reference)
Based on the degree of exploration and research of groundwater resources, and referring to the allowable error of mineral resources at different levels, the allowable error of groundwater extraction volume at different levels can be referred to as follows: C1 The error of groundwater extraction volume, which means: the ratio of the difference between the actual allowable extraction volume verified under natural or expected conditions and the allowable extraction volume submitted for approval to the allowable extraction volume submitted for approval. Error of allowable extraction (%) Actual allowable and approved allowable extraction base × 100 Submitted for approval allowable extraction volume
C2 The allowable error of A-level allowable extraction volume is ±10%; the allowable error of B-level allowable extraction volume is ±20%; the allowable error of C-level allowable extraction volume is ±35%; the allowable error of D-level allowable extraction volume is ±50%; the allowable error of E-level allowable extraction volume is not limited. C3 When calculating the error of the allowable extraction volume of the water source, only the total error of the allowable extraction volume of each aquifer is calculated, and the error of the allowable extraction volume of each aquifer is not calculated separately; the error of the water level drop of each aquifer is not limited. C4 For springs with different stability, according to the flow and precipitation observation data of different series lengths, the interval equations and their error ranges of different assurance levels are calculated, and the level of the allowable extraction star of the spring can be determined by referring to the error range specified in C2. Appendix D
Categories, stages and report names of groundwater resource exploration work (reference)
D1 Groundwater resource exploration work can be divided into 3 categories: 1. Regional hydrogeological exploration: mainly to identify regional hydrogeological conditions and laws, supplemented by delineating the scope of water sources and determining the allowable extraction volume, and its results have many uses. 2. Water source exploration: It is the abbreviation of hydrogeological exploration of groundwater source water supply, mainly to identify the conditions for water source extraction and determine the allowable extraction volume.
3. Regional groundwater resource evaluation: Based on the full collection and analysis of previous data, the groundwater resource volume and reasonable exploitation plan of different categories and levels in this region are proposed through the investigation of exploitation volume and the analysis and calculation of groundwater dynamic observation data. D2 Regional hydrogeological exploration can be divided into three stages: 1. Regional hydrogeological survey;
2. Regional hydrogeological survey;
3. Regional hydrogeological detailed survey.
D3 Water source exploration can be divided into four stages:
1. Water source survey; bzxz.net
2. Water source detailed survey;
3. Water source exploration;
4. Water source expansion exploration.
D4 Groundwater resource exploration should generally be carried out in stages. According to actual conditions, the exploration stages can be simplified and merged.The allowable groundwater extraction volume proposed in the simplified and merged version of GB15218--94 should meet the accuracy requirements of the higher stage. When the regional hydrogeological survey or census research is insufficient, water source survey can be carried out as needed. D5 Name of groundwater resource exploration report: Add the location (province, autonomous region, municipality directly under the central government; city, county), water source (named after the place name) or region name before the groundwater resource exploration category and stage, and add the word "report" at the end. For example: Hydrogeological survey report of the northern section of Taihang Mountain in Hebei Province; water source exploration report of Shanglan Village in Taiyuan City, Shanxi Province; groundwater resource evaluation report in Beijing. Appendix E
Related terms and terms of this standard
(reference)
E1 Groundwater resources groundwater resources are various forms of gravity water buried below the surface. Its burial, water-richness, water quality, etc. can be developed and utilized according to current or future technical and economic conditions, and have actual or potential economic significance. Groundwater resources are characterized by mobility and recoverability. It is a mineral resource and an important part of water resources. Groundwater resources are composed of recharge resources and storage resources. E2 Hydrogeological unit is a groundwater system with unified boundaries and recharge, runoff and discharge conditions. E3 Groundwater well ficld is referred to as water source. The area where groundwater resources have been and may be concentratedly exploited and have value for urban or industrial and agricultural water supply. E4 Suitable ficld for construction water wcll The area suitable for well construction and exploitation of groundwater resources, and the built group or single well has the value of urban or industrial and agricultural water supply. The water source is located in the suitable area, and its scope is smaller than the scope of the suitable well area. E5A-level allowable withdrawal of gradeA is the actual (actuai) allowable withdrawal base. E6B-level allowable withdrawal of gradeB is the measured allowable withdrawal. E7 C-level allowable withdrawal of grade C is the probable allowable withdrawal, E8D-level allowable withdrawal of gradeD is the possible allowable withdrawal. E9E-level allowable withdrawal of gradeA Grade E is the potential (iaient) allowable mining volume. E10 Preliminary feasibility study prefeasibility study is a research report that preliminarily demonstrates the feasibility of the project from the technical and economic aspects, and is the main attachment to the project proposal. E11 Feasibility study feasibility study is a research report that demonstrates the feasibility of the project from the technical and economic aspects, and is the main attachment to the engineering design task book. Additional notes:
This standard is proposed by the National Mineral Reserves Committee. This standard is under the jurisdiction of the Office of the National Mineral Reserves Committee! ! . This standard is drafted by the Office of the National Mineral Reserves Committee. The main drafters of this standard are Qian Xuebo, Bin Dezhi, Han Zaisheng, Wu Ming15
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