Guidelines for safe coastal recreational water environments assessment
Some standard content:
ICS13.020
Marine Industry Standard of the People's Republic of China
HY/T127—2010
Guidelines for safe coastal recreational water environments assessment2010-02-10Issued
State Oceanic Administration
Implementation on 2010-03-01
Normative reference documents
Terms and definitions
Determination of environmental quality elements
Determination of water environment elements
Determination of meteorological elements
Determination of hydrological elements
Determination of landscape elements
Determination of beach geological elements
Data processing and analysis quality control
Station layout
Monitoring period
Monitoring frequency||t t||Calculation method and classification of environmental evaluation index of coastal tourist resorts 5.1
Index type
Sun protection index
Water quality index
Sea surface condition index
Undersea sightseeing index
Maritime sightseeing index
Seaside sightseeing index
Swimming index·
Maritime leisure activity index·
Beach entertainment index
Sea fishing index
Annual comprehensive evaluation of coastal tourist resort environment 6
Annual average index…
Annual average index classification:||tt ||Calculation of the annual average leisure (sightseeing) activity index Appendix A (Normative Appendix) Enterococcus detection method - the most likely number method
Instruments
Sample collection
Culture medium and diluent
Dilution
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A.5.3 Culture medium (MUD/SF culture medium)
A.6 Steps
Choice of diluent
A.6.2 Dilution
A.6.3 Inoculation and culture
A.6.4 Result observation
A.7 Result characterization (determination of characteristic values)
A.8 Test report
Appendix B (Normative Appendix)
Detection and enumeration of enterococci
Filtration, cultivation and enumeration
Instruments and equipment
Culture medium and reagents
Basic materials
Culture medium
Determination steps
Sample preparation
Filtration and cultivation
Confirmation and enumeration
References
Membrane filter method
Appendix A and Appendix B of this standard are normative appendices. This standard is proposed by the National Marine Environmental Monitoring Center. This standard is under the jurisdiction of the National Marine Standardization Technical Committee (SAC/TC283). Drafting units of this standard: National Marine Environmental Monitoring Center, National Marine Environmental Forecast Center. The main drafters of this standard are: Wang Juying, Zhou Lianqi, Zhang Weiwei, Zhang Zhifeng, Chen Yuchun, Chen Changshu, Wu Di. HY/T1272010
1 Scope
Guidelines for Environmental Assessment of Coastal Tourism Resorts
HY/T127—2010
This standard specifies the index system for environmental assessment of coastal tourism resorts and the definitions, calculation methods and classification methods of various marine environmental indices related to leisure and entertainment activities in coastal tourism resorts. This standard is applicable to the assessment of the environmental status of coastal tourism resorts by marine monitoring departments at all levels of the People's Republic of China. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions shall apply to this standard. GB3097 Seawater Quality Standards
GB/T12763.8 Marine Survey Specifications Part 8: Marine Geological and Geophysical SurveysGB/T14914
Coastal Observation Specifications
Marine Monitoring Specifications
GB17378.2
Part 2: Data Processing and Analysis Quality ControlGB17378.4 Marine Monitoring Specifications
Part 4: Seawater Analysis
GB17378.7
GB/T18972
HY/T069
QX/T46
QX/T48
QX/T52
QX/T87
Marine Monitoring Specifications Part 7: Ecological Survey and Biological Monitoring of Coastal Pollution2003 Travel Classification, investigation and evaluation of tourist resources Technical regulations for red tide monitoring
Specifications for ground meteorological observations Part 2: Observation of clouds Specifications for ground meteorological observations
Part 4: Observation of weather phenomena
Specifications for ground meteorological observations
Ultraviolet index forecast
ISO5667-1
Part 8: Precipitation observation
Water quality sampling Part 1: Manual for design of sampling methods ISO5667-2
: Water quality sampling Part 2: Manual for sampling techniques ISO5667-3
ISO8199
3 Terms and definitions
Sampling Part 3: Manual for preservation and handling of samples Water quality
Guide to enumeration of water quality microbial cultures
The following terms and definitions apply to this standard. 3.1
recreational activity
Leisure and entertainment activities (sports)
Swimming, diving, paddling, surfing, wading, boating, fishing, scenery appreciation, walking and ball games in the water bodies of coastal tourist resorts or on the land part adjacent to the water bodies (beach). 3.2
sunprotectionindex
sun protection index
Based on the measurement of ultraviolet intensity, considering the possible impact of ultraviolet radiation on the human body, it is an indicator of whether corresponding protective measures need to be taken when carrying out leisure and entertainment activities (sports) in coastal tourist resorts. 1
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seawaterqualityindex
waterqualityindex
Comprehensively considers coliform bacteria, color, odor, taste, red tide, floating matter, chemical oxygen demand, dissolved oxygen and other water quality factors to obtain a comprehensive index of whether the water quality of the coastal tourist resort sea area is suitable for various coastal leisure and entertainment activities. 3.4
marinephysicalconditionindexComprehensively considers water temperature, wave height, weather phenomena, temperature, wind force, visibility and other factors to obtain a comprehensive index of whether the hydrological and meteorological conditions of the coastal tourist resort sea area are suitable for various coastal leisure and entertainment activities. 3.5
submarinesightseeingindexComprehensively considers water transparency, disgusting organisms, dangerous organisms, color, odor, taste, red tide, floating matter, submarine landscape, water temperature, wave height and other factors to obtain an index of whether it is suitable for self-diving or enjoying the underwater landscape of the coastal tourist resort sea area in a submersible. 3.6
marinesightseeingindex
Maritime sightseeing index
An index of whether it is suitable to enjoy the seascape of the coastal tourist resort by boat on the sea, taking into account factors such as disgusting organisms, color, odor, taste, red tide, floating materials, landscape elements, wave height, weather phenomena, temperature, wind force, visibility, etc. 3.7
Seashore sightseeing index
seashoresightseeingindex
An index of whether it is suitable to enjoy the seascape of the coastal tourist resort on the seaside, taking into account factors such as disgusting organisms, color, odor, taste, red tide, floating materials, landscape elements, weather phenomena, temperature, wind force, visibility, etc. 3.8
Swimming Index
Comprehensively considers factors such as fecal coliform bacteria, disgusting organisms, dangerous organisms, color, odor, taste, red tide, floating matter, dissolved oxygen, water temperature, wave height, weather phenomena, air temperature, wind speed, visibility, etc., to obtain an index of whether it is suitable to swim in the sea area of the coastal tourist resort. 3.9
Maritime recreation indexmariuerecreationindex Comprehensively considers factors such as color, smell, taste, red tide, floating materials, water temperature, wave height, weather phenomenon, temperature, wind force, visibility, etc., to obtain the index of whether it is suitable to carry out marine recreational activities in the sea area of coastal tourist resort. 3.10
Beach entertainment index
beachentertainmentindex
Comprehensively considers the natural conditions of the beach, including the length of the beach, the width on the high tide line, the slope of the foreshore, the slope of the beach shoulder, the composition of sand particles, and factors such as color, smell, taste, red tide, weather phenomenon, temperature, wind force, etc., to obtain the index of whether it is suitable to carry out various recreational activities on the beach of the coastal tourist resort.
Angling indexanglingindex
Comprehensively considers factors such as color, smell, taste, red tide, wave height, weather phenomenon, temperature, wind force, etc., to obtain the index of whether it is suitable to fish in the sea area of coastal tourist resort.
Beachhead
Also called "beach surface", it is the coastal zone between the average low tide line and the average high tide line. 3.13
Beachbottom
Also called "back beach", it is the coastal zone between the average high tide line and the extreme high tide line. 2
Beachberm
The part slightly inclined towards the shore at the boundary between the back shore and the foreshore. 4
Determination of environmental quality elements
Determination of water environment elements
The analysis method of water environment elements in coastal tourist resorts is shown in Table 1. Table 1
Environmental quality monitoring items and observation and analysis methods Category
Landscape elements
Beach geological elements
Fecal coliform group
Enterococcus
Disgusting organisms
Dangerous organisms
Transparency
Odor and smell
Floating matter
Dissolved oxygen
Chemical oxygen demand
Total cloud cover
Weather phenomena
Precipitation
Wind direction and wind speed
Sea surface visibility
UV index
Tourism resource level
Width above the high tide line
Particle composition
Observation and analysis methods
Fermentation Method
Fermentation method
Filter membrane method
Visual method
Biological counting method
Visual method
Daytime method
Transparency disk method
Colorimetry
Sensory method
Visual method
Iodometric method
Alkaline potassium permanganate method
Visual or instrumental measurement
Visual or instrumental measurement
Comparative analysis
Background investigation
Background investigation
Comprehensive method
Background investigation
Background investigation
HY/T127—2010
Cited standard
GB17378.7
See Appendix A
See Appendix B
HY/T069
HY/T069
GB17378.4
GB17378.4
GB17378.4
GB17378.4
GB17378.4
GB/T14914
GB/T 14914 | | tt | | QX/T46 | T12763.8
HY/T127—2010
Determination of meteorological elements
The observation methods of meteorological elements in coastal tourist resorts are shown in Table 1.4.3 Determination of hydrological elements
The observation methods of hydrological elements in coastal tourist resorts are shown in Table 1.4.4 Determination of landscape elements
The observation methods of landscape elements in coastal tourist resorts are shown in Table 1.4.5
Determination of beach geological elements
The observation methods of beach geological elements in coastal tourist resorts are shown in Table 1.4.6 Data processing and analysis quality control
The processing, analysis and quality control of the measured data shall be carried out in accordance with the relevant provisions of GB17378.2, GB17378.7 and Appendix A and Appendix B.
4.7 Station layout
In the water bodies of coastal tourist resorts, the total number of water environment element monitoring stations set up shall not be less than 6. The stations should be evenly distributed throughout the water body of the coastal tourist resort, including the stations with the highest density of tourists and the peripheral points susceptible to external pollution. (2-3) sections can be set up, and (3-8) measuring stations should be set up in each section. The direction of the section should be perpendicular to the main tidal direction or the coast, and the main section should be set at the place with the highest density of tourists.
4.8 Monitoring period
Northern region: The monitoring period for coastal tourist resorts north of Zhejiang (including Zhejiang) is from April 24 to October 7; Southern region: The monitoring period for coastal tourist resorts south of Fujian (including Fujian) is from March 24 to October 30. 4.9 Monitoring frequency
4.9.1 Water environment elements
The monitoring frequencies of different water environment elements are as follows:a) Mandatory elements
-Once a day: offensive organisms, dangerous organisms, red tide, transparency, color, odor, taste, floating matter;-Once a week: coliform bacteria, dissolved oxygen;-Once a month: chemical oxygen demand.
b) Optional elements
Once a week: enterococci;
---Once a month: other water environment elements specified in GB3097. 4.9.2 Hydrometeorological elements
The monitoring frequency of hydrometeorological elements is twice a day (08:00 and 14:00 Beijing time every day). 4.9.3 Landscape elements
The monitoring frequency of landscape elements is once a year. 4.9.4 Beach geological elements
The monitoring frequency of beach geological elements is times a year. 5 Calculation method and classification of environmental evaluation index of coastal tourist resorts 5.1 Index type
The environmental evaluation of coastal tourist resorts adopts the index method to calculate the environmental index and special leisure and sightseeing activity (sports) index respectively. The environmental index of coastal tourist resorts includes sun protection index, water quality index and sea surface condition index. Special leisure and sightseeing activity (sports) index includes submarine sightseeing index, marine sightseeing index, seashore sightseeing index, swimming index, marine leisure activity index, beach entertainment index and sea fishing index. 4
5.2 Sun protection index
5.2.1 Characteristic elements and scoring
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Three characteristic elements, namely total cloud cover, geographical location of coastal tourist resorts and month, are used as the judgment factors for judging the sun protection index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 2. Table 2 Classification standards and scoring of sun protection feature elements Feature index and scoring
Total cloud cover (percent)
Geographical location
Area north of 35°N
11,12,1
5.2.2 Calculation of sun protection index
The sun protection index is calculated by the factor addition method: Where:
Sun protection index;
Spi—the score of total cloud cover;
Area between 30°N and 35°N
Area between 25°N and 30°N
SP=Sp1+Sp2+Sps
Sp2———the score of the geographical location of the coastal tourist resort; Sp: the score of the month.
5.2.3 Classification
Areas between 20°N and 25°N
Areas south of 20°N
5,6,7,8
(1)
The sun protection factor classification is based on 5.2.2, the sun protection index calculated by formula (1), and can also be determined according to the ultraviolet index. The classification standards and corresponding grade descriptions are shown in Table 3.
Sun Protection Index
Ultraviolet
Ultraviolet
Radiation Intensity
Grading Description of Sun Protection Index
Grade Description
Ultraviolet radiation intensity is weak, and generally no protective measures are required when conducting outdoor activities; if outdoor activities are carried out for a long time, it is recommended to apply sunscreen skin care products with an SPF of 8 to 12
Ultraviolet radiation intensity is average, and anti-frost can be applied appropriately when conducting outdoor activities. It is recommended to apply anti-frost with an SPF of 12 to 15. The ultraviolet radiation intensity of sunscreen skin care products is very strong. When engaging in outdoor activities, you should pay attention to protection. It is recommended to wear protective sticks and sunglasses, and apply sunscreen skin care products with SPF higher than 15 and PA 10. The ultraviolet radiation intensity is very strong. When engaging in outdoor activities, you should strengthen protection. It is recommended to wear protective hats and sunglasses, and apply sunscreen skin care products with SPF between 15 and 20 and PA 10. The ultraviolet radiation intensity is extremely strong, and it is not suitable for long-term outdoor activities; if you engage in outdoor activities, it is recommended to wear protective hats and sunglasses, and apply sunscreen skin care products with SPF above 20 and PA 10.
The calculation method of the ultraviolet index is based on the provisions of QX/T87. Note 1: SPF (Sun Protection Factor), also known as the sun protection factor, indicates the level of sun protection effect that sunscreen products can play. Note 2: PA is an indicator of the degree of protection against ultraviolet rays. PA 10 means effective, and PA 10 means quite effective. 5
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5.3 Water Quality Index
5.3.1 Calculation Method of Average Value of Monitoring Data of Each Station If there are multiple monitoring stations in the monitoring sea area, the measurement result of a certain monitoring element shall be represented by the arithmetic mean value of the measurement results of the element at each station. If there is a sewage outlet in the coastal tourist resort or in the adjacent waters, the monitoring data of the stations around the sewage outlet shall not be averaged with the monitoring data of other stations, but shall be calculated by region according to the specific situation. 5.3.2 Characteristic Requirements and Scoring
Six characteristic elements, including fecal coliform group, color, odor, taste, red tide, floating matter, chemical oxygen demand, and dissolved oxygen, are used as the judgment factors for judging the water quality index of the coastal tourist resort water body. The classification standards and scores of each element are shown in Table 4. Table 4 Classification standards and scoring of water quality characteristic elements Characteristic elements and scoring
Fecal coliform
Enterococcus
Color, odor, taste.
Floating matter
Chemical oxygen demand
Dissolved oxygen
Permissible value
Monthly geometric mean"
pieces/100mL
pieces/100mL
≤100
Classification"
>100, and ≤2000
>100, and ≤200
40~200
Seawater should not have strange color, odor, or taste
No red tide
No (there should be no floating oil film, foam, aggregated large algae and other floating matter on the sea surface\)2www.bzxz.net
If the standard values of Class I and Class II are the same, 2 points will be assigned. bThe geometric mean of no less than 5 samplings within 30 days. C The judgment of color, odor and taste shall be carried out in accordance with the relevant provisions of GB17378.4. d The judgment of whether red tide occurs or not shall be carried out in accordance with the provisions of HY/T069. >2. and ≤3
>2 000
The seawater has disgusting and unpleasant color, odor and taste
Red tide occurs
There are (oil film, foam, aggregated
large algae or other floating materials)
eOther floating materials include asphalt residues, wood, plastic, glass products, rubber or any other floating solid waste. In addition to the elements listed in Table 4, other elements listed in GB3097 can also be used as judgment factors for judging the water quality index of coastal tourist resorts. Each element that meets the requirements of the first-class seawater quality standard is assigned 2 points, between the first-class seawater quality standard and the second-class seawater quality standard is assigned 1 point, and exceeds the second-class seawater quality standard is assigned 0 points. 5.3.3 Calculation of water quality index
The water quality index is calculated by factor multiplication method: SQ=SqXSqXSSqXSqs×S6
Wherein:
SQ water quality index;
Sq1\- fecal coliform group score;
Sqa——color, odor and taste score;
red tide score;
floating matter score;
Sqs—chemical oxygen demand score;
（2）
Sge——dissolved oxygen score.
When the selected test index is involved in the calculation of water quality index, the comprehensive water quality index SQ is calculated according to formula (3). SQSqXSq×SqX×Sq,X ×Sqm
Where:
Comprehensive water quality index;
Sq; Score of the jth water quality evaluation index; m
Total number of water quality indicators involved in the evaluation.
5.3.4 Grading
The grading standards of water quality index and the corresponding grading descriptions are shown in Table 5. Table 5 Grading description of water quality index
Water quality index
Comprehensive water quality index
24-1~2m-2
2m3~2++1
Grade description
Excellent water quality, very suitable for coastal leisure and entertainment activitiesExcellent water quality, very suitable for coastal leisure and entertainment activitiesGood water quality, suitable for coastal leisure and entertainment activitiesGeneral water quality, suitable for coastal leisure and entertainment activitiesHY/T127—2010
... .(3)
Poor water quality, unsuitable for coastal leisure and entertainment activities involving direct contact between human body and seawater Note: is the number of elements with the same Class I and Class II standards in the elements involved in the calculation of water quality index, m is the total number of elements involved in the calculation of water quality index, 5.4 Sea surface condition index
5.4.1 Characteristic elements and scoring
Six hydrological and meteorological elements, including water temperature, wave height, weather phenomenon, air temperature, wind force and visibility, are used as the judging factors for judging the sea surface condition index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 6. Table 6 Classification standards and scoring of characteristic elements of sea surface conditions Characteristic elements and scoring
Weather phenomena
Visibility
5.4.2 Calculation of sea surface condition index
Sunny, few clouds, cloudy, overcast
≥20.0, and ≤35.0
The sea surface condition index is calculated by factor multiplication method: Classification
≥18.0, and <23.0
>1.0, and ≤2.0
Light fog, condensation, smoke and light rain||t t||≥15.0, and <20.0; or >35.0
≥1, and <10
OS=05X052X5X0XO55X05
Wherein:
OS. Sea surface condition index;
Os1---—Water temperature score;
Wave height score;
Weather phenomenon score;
Fog, moderate or above precipitation, thunderstorm, tornado
.... (4)2. Key features and scoring
Six key features, including fecal coliform group, color, odor, taste, red tide, floating matter, chemical oxygen demand, and dissolved oxygen, are used as the judging factors for the water quality index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 4. Table 4 Classification standards and scoring of water quality characteristic elements Key features and scoring
Fecal coliform group
Enterococcus
Color, odor, taste.
Floating matter
Chemical oxygen demand
Dissolved oxygen
Permissible value
Monthly geometric mean"
pieces/100mL
pieces/100mL
≤100
Classification"
>100, and ≤2000
>100, and ≤200
40~200
Seawater should not have strange color, odor, or taste
No red tide
No (there should be no floating oil film, foam, aggregated large algae and other floating matter on the sea surface\)2
If the standard values of Class I and Class II are the same, 2 points will be assigned. bThe geometric mean of no less than 5 samplings within 30 days. C The judgment of color, odor and taste shall be carried out in accordance with the relevant provisions of GB17378.4. d The judgment of whether red tide occurs or not shall be carried out in accordance with the provisions of HY/T069. >2. and ≤3
>2 000
The seawater has disgusting and unpleasant color, odor and taste
Red tide occurs
There are (oil film, foam, aggregated
large algae or other floating materials)
eOther floating materials include asphalt residues, wood, plastic, glass products, rubber or any other floating solid waste. In addition to the elements listed in Table 4, other elements listed in GB3097 can also be used as judgment factors for judging the water quality index of coastal tourist resorts. Each element that meets the requirements of the first-class seawater quality standard is assigned 2 points, between the first-class seawater quality standard and the second-class seawater quality standard is assigned 1 point, and exceeds the second-class seawater quality standard is assigned 0 points. 5.3.3 Calculation of water quality index
The water quality index is calculated by factor multiplication method: SQ=SqXSqXSSqXSqs×S6
Wherein:
SQ water quality index;
Sq1\- fecal coliform group score;
Sqa——color, odor and taste score;
red tide score;
floating matter score;
Sqs—chemical oxygen demand score;
（2）
Sge——dissolved oxygen score.
When the selected test index is involved in the calculation of water quality index, the comprehensive water quality index SQ is calculated according to formula (3). SQSqXSq×SqX×Sq,X ×Sqm
Where:
Comprehensive water quality index;
Sq; Score of the jth water quality evaluation index; m
Total number of water quality indicators involved in the evaluation.
5.3.4 Grading
The grading standards of water quality index and the corresponding grading descriptions are shown in Table 5. Table 5 Grading description of water quality index
Water quality index
Comprehensive water quality index
24-1~2m-2
2m3~2++1
Grade description
Excellent water quality, very suitable for coastal leisure and entertainment activitiesExcellent water quality, very suitable for coastal leisure and entertainment activitiesGood water quality, suitable for coastal leisure and entertainment activitiesGeneral water quality, suitable for coastal leisure and entertainment activitiesHY/T127—2010
... .(3)
Poor water quality, unsuitable for coastal leisure and entertainment activities involving direct contact between human body and seawater Note: is the number of elements with the same Class I and Class II standards in the elements involved in the calculation of water quality index, m is the total number of elements involved in the calculation of water quality index, 5.4 Sea surface condition index
5.4.1 Characteristic elements and scoring
Six hydrological and meteorological elements, including water temperature, wave height, weather phenomenon, air temperature, wind force and visibility, are used as the judging factors for judging the sea surface condition index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 6. Table 6 Classification standards and scoring of characteristic elements of sea surface conditions Characteristic elements and scoring
Weather phenomena
Visibility
5.4.2 Calculation of sea surface condition index
Sunny, few clouds, cloudy, overcast
≥20.0, and ≤35.0
The sea surface condition index is calculated by factor multiplication method: Classification
≥18.0, and <23.0
>1.0, and ≤2.0
Light fog, condensation, smoke and light rain||t t||≥15.0, and <20.0; or >35.0
≥1, and <10
OS=05X052X5X0XO55X05
Wherein:
OS. Sea surface condition index;
Os1---—Water temperature score;
Wave height score;
Weather phenomenon score;
Fog, moderate or above precipitation, thunderstorm, tornado
.... (4)2. Key features and scoring
Six key features, including fecal coliform group, color, odor, taste, red tide, floating matter, chemical oxygen demand, and dissolved oxygen, are used as the judging factors for the water quality index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 4. Table 4 Classification standards and scoring of water quality characteristic elements Key features and scoring
Fecal coliform group
Enterococcus
Color, odor, taste.
Floating matter
Chemical oxygen demand
Dissolved oxygen
Permissible value
Monthly geometric mean"
pieces/100mL
pieces/100mL
≤100
Classification"
>100, and ≤2000
>100, and ≤200
40~200
Seawater should not have strange color, odor, or taste
No red tide
No (there should be no floating oil film, foam, aggregated large algae and other floating matter on the sea surface\)2
If the standard values of Class I and Class II are the same, 2 points will be assigned. bThe geometric mean of no less than 5 samplings within 30 days. C The judgment of color, odor and taste shall be carried out in accordance with the relevant provisions of GB17378.4. d The judgment of whether red tide occurs or not shall be carried out in accordance with the provisions of HY/T069. >2. and ≤3
>2 000
The seawater has disgusting and unpleasant color, odor and taste
Red tide occurs
There are (oil film, foam, aggregated
large algae or other floating materials)
eOther floating materials include asphalt residues, wood, plastic, glass products, rubber or any other floating solid waste. In addition to the elements listed in Table 4, other elements listed in GB3097 can also be used as judgment factors for judging the water quality index of coastal tourist resorts. Each element that meets the requirements of the first-class seawater quality standard is assigned 2 points, between the first-class seawater quality standard and the second-class seawater quality standard is assigned 1 point, and exceeds the second-class seawater quality standard is assigned 0 points. 5.3.3 Calculation of water quality index
The water quality index is calculated by factor multiplication method: SQ=SqXSqXSSqXSqs×S6
Wherein:
SQ water quality index;
Sq1\- fecal coliform group score;
Sqa——color, odor and taste score;
red tide score;
floating matter score;
Sqs—chemical oxygen demand score;
（2）
Sge——dissolved oxygen score.
When the selected test index is involved in the calculation of water quality index, the comprehensive water quality index SQ is calculated according to formula (3). SQSqXSq×SqX×Sq,X ×Sqm
Where:
Comprehensive water quality index;
Sq; Score of the jth water quality evaluation index; m
Total number of water quality indicators involved in the evaluation.
5.3.4 Grading
The grading standards of water quality index and the corresponding grading descriptions are shown in Table 5. Table 5 Grading description of water quality index
Water quality index
Comprehensive water quality index
24-1~2m-2
2m3~2++1
Grade description
Excellent water quality, very suitable for coastal leisure and entertainment activitiesExcellent water quality, very suitable for coastal leisure and entertainment activitiesGood water quality, suitable for coastal leisure and entertainment activitiesGeneral water quality, suitable for coastal leisure and entertainment activitiesHY/T127—2010
... .(3)
Poor water quality, unsuitable for coastal leisure and entertainment activities involving direct contact between human body and seawater Note: is the number of elements with the same Class I and Class II standards in the elements involved in the calculation of water quality index, m is the total number of elements involved in the calculation of water quality index, 5.4 Sea surface condition index
5.4.1 Characteristic elements and scoring
Six hydrological and meteorological elements, including water temperature, wave height, weather phenomenon, air temperature, wind force and visibility, are used as the judging factors for judging the sea surface condition index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 6. Table 6 Classification standards and scoring of characteristic elements of sea surface conditions Characteristic elements and scoring
Weather phenomena
Visibility
5.4.2 Calculation of sea surface condition index
Sunny, few clouds, cloudy, overcast
≥20.0, and ≤35.0
The sea surface condition index is calculated by factor multiplication method: Classification
≥18.0, and <23.0
>1.0, and ≤2.0
Light fog, condensation, smoke and light rain||t t||≥15.0, and <20.0; or >35.0
≥1, and <10
OS=05X052X5X0XO55X05
Wherein:
OS. Sea surface condition index;
Os1---—Water temperature score;
Wave height score;
Weather phenomenon score;
Fog, moderate or above precipitation, thunderstorm, tornado
.... (4)(3)
Poor water quality, unsuitable for coastal leisure and entertainment activities involving direct contact between human body and seawater Note: is the number of elements with the same Class I and Class II standards in the water quality index calculation, m is the total number of elements involved in the water quality index calculation, 5.4 Sea surface condition index
5.4.1 Characteristic elements and scoring
Six hydrological and meteorological elements, including water temperature, wave height, weather phenomenon, air temperature, wind force and visibility, are used as the judging factors for judging the sea surface condition index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 6. Table 6 Classification standards and scoring of characteristic elements of sea surface conditions Characteristic elements and scoring
Weather phenomena
Visibility
5.4.2 Calculation of sea surface condition index
Sunny, few clouds, cloudy, overcast
≥20.0, and ≤35.0
The sea surface condition index is calculated by factor multiplication method: Classification
≥18.0, and <23.0
>1.0, and ≤2.0
Light fog, condensation, smoke and light rain||t t||≥15.0, and <20.0; or >35.0
≥1, and <10
OS=05X052X5X0XO55X05
Wherein:
OS. Sea surface condition index;
Os1---—Water temperature score;
Wave height score;
Weather phenomenon score;
Fog, moderate or above precipitation, thunderstorm, tornado
.... (4)(3)
Poor water quality, unsuitable for coastal leisure and entertainment activities involving direct contact between human body and seawater Note: is the number of elements with the same Class I and Class II standards in the water quality index calculation, m is the total number of elements involved in the water quality index calculation, 5.4 Sea surface condition index
5.4.1 Characteristic elements and scoring
Six hydrological and meteorological elements, including water temperature, wave height, weather phenomenon, air temperature, wind force and visibility, are used as the judging factors for judging the sea surface condition index of coastal tourist resorts. The classification standards and scoring of each element are shown in Table 6. Table 6 Classification standards and scoring of characteristic elements of sea surface conditions Characteristic elements and scoring
Weather phenomena
Visibility
5.4.2 Calculation of sea surface condition index
Sunny, few clouds, cloudy, overcast
≥20.0, and ≤35.0
The sea surface condition index is calculated by factor multiplication method: Classification
≥18.0, and <23.0
>1.0, and ≤2.0
Light fog, condensation, smoke and light rain||t t||≥15.0, and <20.0; or >35.0
≥1, and <10
OS=05X052X5X0XO55X05
Wherein:
OS. Sea surface condition index;
Os1---—Water temperature score;
Wave height score;
Weather phenomenon score;
Fog, moderate or above precipitation, thunderstorm, tornado
.... (4)
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