What should be paid attention to when evaluating the quality of a water source

There are two main types of evaluation methods.

1.The first is an evaluation method based on the measured values of physical and chemical parameters of water quality.

2.The first type is a biological evaluation based on the relationship between aquatic populations and water quality.

The physical and chemical parameter evaluation method is mostly used, which is divided into: The single parameter evaluation method is to compare the measured concentration representative value of a parameter with the water quality standard to judge the quality of water quality or the degree of applicability. The multi-parameter comprehensive evaluation method is to integrate several selected parameters into a general index to evaluate water quality, also known as index evaluation method.

The index evaluation method uses two kinds of indexes, namely, the parameter weight score superposition index and the parameter relative quality superposition index. The calculation method of the superposition index of parameter weight score is to select a number of evaluation parameters, determine the weight coefficient according to the degree of influence of each parameter on water quality, then divide each parameter into several grades, score according to the quality of the index, and finally add the scores of each parameter to obtain the comprehensive water quality index. A large value indicates good water quality, while a small value indicates poor water quality.

This index is used to express water quality, and the method is concise and easy to calculate. The calculation method of the relative mass superposition index of parameters is to select a number of evaluation parameters, compare the actual concentration of each parameter with the corresponding evaluation standard concentration, find the relative quality index of each parameter, and then find the sum value. According to the principle of adaptation of organisms to environmental conditions, the biological evaluation method can reflect the comprehensive status of water environment quality by observing the damage symptoms or population composition of aquatic organisms, so it can not only review and evaluate the water environment quality, but also evaluate the impact of the ecological effect of the proposed project, which is a supplement to the physical and chemical parameter evaluation method.

The disadvantage is that it is difficult to determine the nature and content of water pollutants.

The water quality standard is based on different evaluation types, and the corresponding water quality standard is adopted. Evaluate the quality of the water environment and adopt the quality standards of the surface water environment; To evaluate the quality of aquaculture water bodies, fishery water quality standards should be adopted; Evaluate the water quality of the centralized drinking water intake point, and use the surface water sanitation standards; Evaluate farmland irrigation water and adopt farmland irrigation water quality standards. Generally, various water quality standards promulgated by the state or local ** are used as evaluation criteria.

In the absence of a prescribed water quality standard, the water quality benchmark or the water quality background value of the water system can be used as the evaluation standard.

I know that I saw the sign of Henan Provincial Academy of Safety Sciences in Zhengzhou West Development Zone, and asked my friend what this is for You should be looking for this The name of the company seems to be Xin Anli Occupational Health Evaluation.

The quality of drinking water should meet the following basic requirements to ensure the safety of users. Drinking water shall not contain pathogenic microorganisms. Chemicals in drinking water must not endanger human health.

The importance of water

(1) Water is a good solvent for a variety of minerals, microorganisms, glucose, amino acids and other nutrients, and participates in the transport of substances in the human body, it will transport nutrients to the cells, and at the same time transport away the metabolic waste in the human body. Water is the main component of the human body's thermoregulatory system, and the heat generated by energy metabolism in the human body is carried away by evaporation or perspiration to keep the body's body temperature constant.

(2) Water can play a lubricating roleWater is indispensable for the formation of joint lubricants, saliva, gastrointestinal mucus secreted by the digestive tract, mucus in the respiratory airways, and mucus from the genitourinary tract.

Second, how to use water rationally.

1) Wash rice and store it in a bucket or basin to wash vegetables. Experiments have proved that washing rice water can greatly reduce the pesticide residues of vegetables, and not to mention whether it makes sense, just saying that washing vegetables after washing rice water increases the utilization rate compared with directly pouring it out.

2) Collect the water for washing vegetables and water the flowers or flush the toilet. Prepare a special bucket to store washing water, after a long time, the soil and other impurities in the water gradually precipitate, the surface water can be used to flush the toilet, and the remaining water with impurities is used to water the flowers, and also invisibly fertilize the flowers and plants, the best of all three.

Compliant with the country.

Drinking water hygiene standard GB5749-2006.

From July 1, 2012, the "Sanitary Standards for Drinking Water" (hereinafter referred to as the "New Standards") jointly revised by the National Standards Committee and the Ministry of Health will be officially implemented, and all waterworks will implement stricter testing standards. The 106 indicators in the new standard are divided into two categories: routine inspection items and non-routine inspection items. Among them, there are 42 routine inspection items, which must be uniformly verified in all places; There are 64 non-routine inspection items, and the specific implementation date shall be determined by the provincial people** according to the actual situation, but the implementation of all indicators shall not be later than July 1, 2012.

The main basis is: the national standard for urban tap water (GB5749-85).

According to the environmental functions and protection objectives of surface water waters, they are divided into five categories according to the level of functions

Category: Mainly applicable to source water and national nature reserves;

It is mainly suitable for centralized domestic drinking water surface water source first-class protection area, rare aquatic organism habitat, fish and shrimp production ground, juvenile fish feeding ground, etc.;

It is mainly suitable for fishery waters and swimming areas such as centralized domestic drinking water surface water source secondary protection areas, fish and shrimp wintering grounds, migratory passages, and aquaculture areas;

Category: Mainly suitable for general industrial water areas and recreational water areas that are not in direct contact with the human body;

Category: Mainly applicable to agricultural water areas and general landscape requirements of waters.

Corresponding to the above-mentioned five types of water functions of surface water, the standard values of the basic items of surface water environmental quality standards are divided into five categories, and the standard values of the corresponding categories are implemented for different functional categories. The standard value of the high water function category is stricter than the low standard value of the water function category. Where there are multiple types of functions in the same water area, the standard value corresponding to the highest functional category shall be implemented.

The realization of water function and the achievement of functional category standards have the same meaning.

Whether the tap water quality at home is good or not, teach you a few tricks, easily identify, don't drink the wrong one.

In China's water quality evaluation system, cherished water refers to water bodies with water quality of Class I or Class II water. This type of water body is usually a simple natural water resource such as rivers and lakes, or a tap water source that can reach the chain to withstand Class I or Class II water after treatment. Cherishing water is currently the most precious part of China's water resources, with high water quality standards and nutritional value.

In China's water quality evaluation system, water bodies of Class III and below are usually regarded as inferior Class 5 water, and corresponding treatment measures need to be taken to improve water quality. The fourth category of water is mildly polluted water, which requires measures such as pretreatment and disinfection to control water pollution. Category 5 water is heavily polluted water that requires advanced treatment and other measures to meet the requirements for drinking and production water.

Therefore, in China's water quality evaluation system, cherished water is the best type of water, representing the best quality part of China's water resources.

Briefly describe the basic requirements for selecting a water source. A:(1) Abundant water.

2) The water quality is good.

3) Convenient for health protection.

4) Economically reasonable and technically feasible.

I am an old student, I have applied for the self-examination a long time ago, but I have not been able to stick to the middle of the school, and now I want to continue the exam, and I also hope to give myself an explanation. I signed up for the tutorial class of the online school, hoping to pass it smoothly, and at the same time wishing the new knowledge of history better and better.

I just checked the results of the Pang family, "Linear Algebra (Economics and Management)" 94 points, Suida thanks Mr. Gao Rui.

Summary. Hello! Water resources evaluation plays a vital role and significance in water resources planning.

First of all, water resources assessment can help us to fully understand the quantity, quality and distribution of water resources, and provide a scientific basis for water resources planning. Through the evaluation of water resources, we can clarify the availability of water resources, the status of water quality, and the differences in water resources between different regions, so as to rationally plan and allocate water resources and ensure the sustainable use of water resources. Secondly, water resources assessment can assist decision-makers and assess the demand and situation of water resources, and provide a reference for formulating water resources planning.

Through the evaluation of water resources, the future water demand and capacity can be analyzed and helped to formulate reasonable water resources planning measures to meet the demand for water resources for social and economic development. In addition, water resources assessment can also evaluate the environmental impact and ecological benefits of water resource use, and provide support for ecological protection and sustainable development. Through the evaluation of water resource utilization, we can analyze the impact of water resources utilization on the environment, and evaluate its impact on the ecosystem and ecological benefits, so as to pay more attention to the protection and restoration of the ecological environment in water resources planning, and realize the coordinated development of economic development and ecological environment.

3.This paper discusses the role and significance of water resources evaluation in water resources planning.

Hello! Water resources evaluation plays a vital role and significance in water resources planning. First of all, water resources assessment can help us to fully understand the quantity, quality and distribution of water resources, and provide a scientific basis for water resources planning.

Through the evaluation of water resources, we can clarify the availability of water resources, the status of water quality, and the differences in water resources between different regions, so as to rationally plan and allocate water resources and ensure the sustainable use of water resources. Water resources assessment can assist decision-makers in assessing the demand and situation of water resources, and provide a reference for formulating water resources planning. Through the evaluation of water resources, the future water demand and capacity can be analyzed and helped to formulate reasonable water resources planning measures to meet the demand for water resources for social and economic development.

In addition, the evaluation of water cover resources can also evaluate the environmental impact and ecological benefits of water resource utilization, and provide support for ecological protection and sustainable development. Through the evaluation of water resource utilization, we can analyze the impact of water resources utilization on the environment, and evaluate its impact on the ecosystem and ecological benefits, so as to pay more attention to the protection and restoration of the ecological environment in water resources planning, and realize the coordinated development of economic development and ecological environment.

In summary, the role and significance of water resources evaluation in water resources planning cannot be ignored. It provides a scientific basis and reference for decision-makers to help realize the rational use and sustainable development of water resources. At the same time, it also promotes the protection of the ecological environment and the coordination of economic development and consumption.

Through water assessment, we are able to better manage and use water resources and achieve a harmonious coexistence between man and nature.

According to the provisions of China's "Sanitary Standard for Drinking Water" (GB5749-2006), the water quality level is different, and its applicable uses are also different. As domestic drinking water, it must meet Class III standards or higher requirements. The following are several situations in which it cannot be used as a source of drinking water:

Class water sources: Class V water sources are heavily polluted water, including sewage ditches in fertile agricultural watersheds, farmland drainage, and sewage that is not easy to meet in urban sewage treatment. Class V water sources are mainly used for industrial and farmland irrigation, and can never be used for domestic drinking.

Class water sources: Class VI water sources are heavily polluted and difficult to treat water, mainly including landfills, chemical plant sewage, etc. Class VI water sources pose a very high health risk and should not be used for any production or domestic purposes.

3.Wild mountain spring water: There may be various chemicals and microorganisms in wild mountain spring water, and many mountain spring water is not suitable for direct drinking.

When carrying out field activities, it is necessary to fully treat the drinking water to ensure the safety and hygiene of the mountain. If you need drinking water, please choose tap water or boiled water that has undergone filtration, treatment, disinfection and other procedures that meet the relevant standards and regulations, or other effective drinking water treatment methods to ensure water quality safety. The above information is in Zhihu.

The water quality below Class 3 is poor and cannot be used as a source of drinking water. Class 1 water quality is good, groundwater only needs to be disinfected, and surface water can be used for domestic drinking after simple purification treatment (such as filtration) and disinfection. After conventional purification (such as flocculation, sedimentation, filtration, disinfection, etc.), Class 2 water quality can be sold for domestic drinking.

After treatment, the 3 types of water quality can also be used for daily drinking. The water quality below Class 3 is poor and cannot be used as a source of drinking water. Water bodies that exceed the 5 water quality standards are called inferior 5 categories and basically have no use function.

Drinking water can provide the human body with a variety of substances it needs, and it is also necessary or necessary to maintain normal metabolism. For adults, it is necessary to drink about 2000 ml of water every day, and if you sweat a lot and exercise vigorously, you can increase it appropriately. Generally, mineral water is chosen, and warm boiled water is more suitable.