Investigation report on water quality in Hainan Province

Part I: Research scheme.

A research topic: investigation of water quality in Hainan Province

Instructor: Zheng Huicheng

Three members of the project team: Wang Tingguang, Xu Zhen 'ang, Chen Yimin, Wang Peicheng and Li Maowen.

Team leader: Wang Tingguang

Research purposes: (1) Understand the water quality in our province, better protect the water quality in our province and raise people's awareness.

(2) Integrate what you have learned in class and improve your practical ability.

Five research methods: (1) Internet search.

(2) Visit

Division of labor among the six members: Team leader: Wang Tingguang's main work: organizing members to investigate and discuss issues.

Deputy Head: Chen Yimin's main work: sorting out materials and writing research reports.

Secretary: Li Maowen's main job is to record the contents of the meeting and manage the finance.

Members: Wang Peicheng and Xu Zhen 'ang. Their main job: search information on the Internet and visit relevant personnel.

Seven. Activity plan: the first 1 1 week; Discuss and arrange the activity plan

Week 12; Interview some residents in Dongshan reach of Nandujiang River and consult relevant information.

Week 13; sort out data

Week 14; Report writing

Activity slogan: take it seriously and focus on participation.

write a report

In the form of writing a report, publicly display the query results in classes, campuses and blogs.

Part II: Research process.

On April 26th, we began to discuss how to carry out the research, and position and arrange the whole development process. Make preparations in all aspects to prevent delays.

On May 2-3, we visited the Dongshan section of Nandu River, and only interviewed some local residents about the changes of river water in recent years and the treatment methods of their daily water use.

On May 4-5, a group of us came to the Internet cafe in the town to consult the relevant information.

Starting from May 10, we sorted out the collected information, visited some places, and then began to write the report.

Part III: Survey results.

According to the materials obtained from the investigation and practice of each team member, we roughly summarize as follows:

(1) Domestic sewage and industrial wastewater are the main pollutants in nan river. Difficult river basins receive 33.53 million tons of industrial, domestic and aquaculture wastewater every year. Domestic sewage from Baisha, Tunchang, Ding 'an and Chengmai counties is directly discharged into difficult rivers without treatment. Every day in Chengmai County alone, 26,000 tons of domestic sewage is discharged into nan river.

In 2004, the total amount of wastewater discharged from Haikou City was 65.438+0.24 billion tons. Among them, wastewater accounts for 60.5% and domestic sewage accounts for 39.5%. Dingcheng Town has a population of more than 50,000 people, producing more than 6,000 tons of domestic sewage every day, which is directly discharged into Nandu River through seven domestic sewage outfalls. It is understood that these sewage outlets are only about 20 kilometers away from the water intake point in Longtang, Haikou.

In recent years, the water quality in our province has been deteriorating, and the water in many places has been polluted to varying degrees. Even Baisha, the birthplace of the largest river in our province, has been polluted, and people there can't drink sanitary water, which seriously affects the health of residents.

(2) In order to understand the water quality of our province, our group investigated the water quality of Difficult River, Wanquan River, Changhua River, various reservoirs and their tributaries, groundwater and coastal areas.

In 2004, the water environment quality in our province continued to be good. 82.5% of the monitored river sections and 87.5% of the monitored lakes and reservoirs meet or exceed the national Class III standard for surface water drinking water sources; The water quality of rivers, lakes and reservoirs is generally lower than that in 2003. The water quality in coastal waters is mainly Class I and II, and the underground water quality is excellent. However, some surface water bodies are polluted by urban domestic sewage and agricultural non-point sources, and some sea areas near cities and some middle sea areas of aquaculture are polluted by domestic sewage and aquaculture wastewater.

The overall water quality of rivers is lower than that in 2003. The monitoring sections whose water quality meets the national standard of Class II surface water account for 665,438 0.9%, and the sections with Class III and Class V water quality account for 20.6%, 65,438 0.7% and 4.8% respectively. Ⅳ and Ⅴ water quality is mainly distributed in some small and medium-sized rivers of Nandu River, parts and sections of small and medium-sized rivers, mostly in urban reach; The main pollution indicators are chemical nutrient oil, permanganate index, ammonia nitrogen and petroleum. In 2004, due to less rainfall, drought, water dilution, decreased self-purification ability and other reasons, the water quality of some river sections declined to varying degrees, and the water quality of Class I and II river sections decreased by 9 percentage points compared with 2003.

The overall water quality of Nandujiang River is slightly lower than that in 2003. The water quality of all monitoring sections of the main stream has reached the national standard of Class III surface water, with Class II water quality as the main one. The water quality of Longzhou River, the main tributary, reaches the second-class standard, while that of Haidian River is the fourth-class.

The water quality of the main stream of Wanquan River is equivalent to that in 2003, and the water quality of all monitoring sections meets or exceeds the second-class standard.

Generally speaking, the water quality of Changhua River is equivalent to that of 2003. The water quality of 75% of the monitored reaches of the main stream reaches the second-class standard, and 25% reaches the third-class standard. The water quality of all monitored reaches of Nansheng River and Heshun Canal, the main tributary, has reached the second-class standard.

The water quality of small and medium-sized rivers has decreased compared with 2003. Of the 34 sections of the monitored 16 rivers, 73.5% meet or exceed Class III standards, of which Class II, III and V water quality sections account for 58.8%, 14.7%, 17.7%, and Class IV and V water quality sections account for 8.8%, mainly distributed in the north. Compared with 2003, the chemical oxygen demand, permanganate index, ammonia nitrogen and petroleum content of some small and medium-sized rivers in the south, such as Sanya River and Tengqiao River, have increased to varying degrees.

Generally speaking, the water quality of urban reach is equivalent to that of 2003. Of the 12 monitoring sections of 12 rivers flowing above the county seat, 66.7 sections meet or exceed the Class III standard, and the water quality of Class IV and Class V accounts for 25.0% and 8.3% respectively. Centralized drinking water sources Except Wanning Reservoir, the water quality of the monitored centralized drinking water sources has reached or exceeded the national standard of Class III surface water, and the water quality is mainly Class II.

The overall water quality of lakes and reservoirs is slightly lower than that in 2003. Of the 6 major lakes and reservoirs monitored in/kloc-0, 87.5% meet or exceed the Class III standard for surface water, of which 50.0% are lakes and reservoirs with Class I and II water quality, 37.6% are lakes and reservoirs with Class III water quality, and 6.2% are lakes and reservoirs with Class IV and worse than Class V water quality respectively. Lakes and reservoirs that meet the Class II water quality standard of surface water include Songtao Reservoir, Gaopo Reservoir, Shuiyuanchi Reservoir, Chitian Reservoir, Tangong Reservoir, Taipingshan Reservoir, Linan Lake and Guangba Reservoir. Fushan Reservoir, Zhuang Yong Reservoir, Shilu Reservoir, Chunjiang Reservoir, Shahe Reservoir and Shentian Reservoir meet the Class III standard of surface water, and the water quality of Wanning Reservoir and Shapo Reservoir is Class IV and worse than Class V respectively. Lakes and reservoirs with water quality worse than Class III are mainly affected by nitrogen and phosphorus nutrients, permanganate index, chemical oxygen demand and petroleum. Compared with 2003, the pollution of nitrogen and phosphorus nutrients in Taipingshan Reservoir and Tangong Reservoir has improved, and the water quality has improved, but the impact of nitrogen and phosphorus nutrients on individual lakes and reservoirs has increased.

The coastal waters are dominated by Grade I and II water quality, and most of them are in a clean state. The pollution of inorganic nitrogen and oxygen-consuming organic matter in some sea areas has improved, but the pollution of petroleum is more serious than that in 2003.

Due to the influence of petroleum, the water quality of most sea areas in Haikou Bay meets the third-class water return standard. The water quality of holiday beaches in the western coast of Haikou City, the mouth of Sanlian Village and the maritime entertainment area meets or exceeds the second-class standard.

The water quality of Tianya Haijiao, Dadonghai and Yalong Bay near Sanya has reached the first-class seawater standard; Sanya Port belongs to Class III seawater; Affected by municipal domestic sewage, Sanya estuary is divided into four types of seawater, and the main pollutants are inorganic nitrogen and petroleum.

Its offshore, Qionghai Boao, is a kind of seawater. Wenchang Bamen Bay and Yelin Bay belong to Class II seawater, and Qinglan Port belongs to Class II seawater, which is affected by phosphate. Lingao Jinpai Port and Lingao Cape are a kind of seawater. The sea area of Eman in Yangpu belongs to Class I seawater, and the coastal waters of Yangpu Port are affected by active phosphate, and the water quality belongs to Class III. The water quality in the waters near Dongfang Basuo is Grade II. The water quality of Bashuo Port meets the three kinds of seawater standards. The seawater quality of some sea areas in some aquaculture concentration areas only meets the third and fourth class seawater standards.

The groundwater quality is generally good, and most of the water quality in the main mining areas is Grade II and III, which meets the standard of centralized drinking water source for groundwater. Compared with 2003, the groundwater quality in Haikou area is generally good, and only the pore water quality of Quaternary loose rocks has deteriorated. The main components of diving water quality exceeding the standard are nitrite, iron and chemical oxygen consumption, among which nitrite is polluted by chemical fertilizer and domestic wastewater. Compared with historical data, iron and chemical oxygen consumption temporarily exceeded the standard. The water quality of confined aquifer is generally good, and manganese in some areas exceeds the standard, which belongs to the background value exceeding the standard.

The groundwater level is slightly lower than that in 2003. In 2004, due to less rainfall, the groundwater level in Haikou City generally declined, especially in volcanic rocks, with the range of 1.5-7.66 meters. The water levels of underground water sources in Sanya, hot water fields and hot water fields in Guantang area of Qionghai are basically stable. The groundwater level in Xinglong area of Wanning is basically stable; The water level in the paddy field of thermal mine decreased moderately, by 2.86 meters.

(3) The above information is what we found through the Internet. At the same time, we also got some information through interviews. The following is our conversation with a farmer who lives by the Nandu River:

A member of our group, a farmer.

Hello, uncle. We are students of Dongshan Middle School. Now we want to ask you some questions, okay?

B: `````` (Nodding at us)

Is the water clear here?

I don't know.

Has this river changed in recent years?

Well, it has changed a lot. Now the water is black, so you can't drink it directly, and the amount of water is small.

Do you often use pesticides?

No pesticide, no harvest.

How is domestic sewage treated?

B: Just pour it out.

We also asked several farmers the same question, and their answers were almost the same. From their conversation, we found that many farmers' awareness in this area is very weak, so we hope that the government will strengthen publicity and management in this area, raise people's awareness, reduce pollution sources as much as possible, and ensure people's normal life.

Experience: Through this activity, we have a general understanding of the water quality in our province in recent years, and always remind us to save water and use water scientifically. As a high school student, we have the obligation to publicize how to prevent and control water pollution, improve the safety of our lives and take the road of sustainable development. This activity gave us a deep feeling, because it gave us an opportunity to start work, let us know more knowledge and increase our knowledge. We look forward to the next event and hope that more people will have the opportunity to participate.

Instructor evaluation:

In the process of this comprehensive practical activity, the students have a clear goal and a detailed division of labor, and actively participate in it, so as to better complete the task of this activity and achieve the expected results. Through this comprehensive practical activity, students' team consciousness is cultivated and their creativity and practical ability are improved.

Respondent: chy 09 13 _ 0- Level III 2008-8- 15 18:40.

Investigation report on water resources

In order to combine the knowledge and practice of environmental protection we learned in school, the student union organized a water quality survey. Under the guidance of environmental protection personnel, the students investigated the water quality of Pingshui River, got a deep understanding of the relevant contents of Pingshui River, and interviewed coastal residents and leaders of relevant departments.

According to recent surveys, China's total water resources are about 38 trillion cubic meters, ranking sixth in the world. However, the per capita possession is only 2300 cubic meters, which is equivalent to 1/4 of the world's per capita water consumption, ranking 1 10 in the world. China has been listed as one of the countries with per capita water 13 in the world.

I. Overview of Freshwater Pollution in China

With the increase of population and pollution, more than 300 cities in China are short of water, and the water quality of rivers, lakes and reservoirs is generally polluted to varying degrees. 78% of urban river reach is not suitable as drinking water source, and more than 80% of urban industrial wastewater and domestic sewage are directly discharged into rivers, lakes and seas without treatment, polluting seven major water systems and major freshwater lakes. The coastal waters of the East China Sea, Bohai Sea, Yellow River and South China Sea are seriously polluted, and the pollution of inorganic nitrogen, inorganic phosphorus and petroleum generally exceeds the standard.

Two. General situation of Pingshui River

Pingshui River is the largest river in our city. It originates from Yang Qi scenic spot, and its tributaries flow into it. The central part runs through Pingxiang City, with a drainage area of 1.600 square kilometers. It is the main source of domestic water, industrial water and agricultural water for Pingxiang residents.

Three. Investigation on water quality of pingshui river. (interview)

In view of the situation of Pingshui River, we conducted an investigation.

Reporter: Hello, I want to ask you some questions about Pingshui River. What about the Pingshui River you saw before?

Passerby: The river is clear. You can wash clothes, vegetables and take a bath. Pingshui River was once a waterway in history.

Reporter: What about Pingshui River now?

Passerby: The water quality of this river has obviously deteriorated. In some areas, you can see a layer of oil on the water and a lot of rubbish floating on the river. The river narrows and the water becomes shallow.

Reporter: What do you think is the reason for the present situation of Pingshui River today?

Passerby: Nearby, children poured garbage into the river and discharged sewage. The relevant government departments did not perform their duties well.

Reporter: Hello, can I ask you some questions? What's the difference between Pingshui River now and before?

Residents living on the river bank: In the past, the water was cleaner and the environment along the river was good. Now garbage often floats on the river. There are many mosquitoes in summer, and the smell is bad. After treatment, the situation has improved.

Reporter: Why do you think there is such a change?

Residents: Some people have poor environmental awareness and dump garbage into the river. Wastewater discharge from factories, mines and farmland along the way.

Reporter: Sorry. What do you think of Pingshui River now?

Fisherman: The river is muddy and there are few fish. I sat all morning and only caught a few small fish.

Reporter: Why do you think this happened?

Fisherman: It may be related to the disorderly discharge of domestic and industrial wastewater.

Then, the reporter and his party came to the Municipal Environmental Protection Bureau and interviewed relevant leaders.

The Environmental Protection Bureau said that in the future governance, it will intensify (1) publicity, establish and improve the public's awareness of environmental protection, (2) intensify management and crackdown, rectify enterprises that fail to meet the discharge standards within a time limit, and resolutely ban enterprises that seriously pollute the environment. Realize non-toxic and harmless discharge. (3) Improve the environmental awareness of all citizens. People's awareness of environmental protection has improved. Only by consciously caring for the environment can we fundamentally reduce the pollution of water resources.

Pingshui River is the mother river of Pingxiang, and it is our common wish to manage it well. I hope that in the near future, a clean and clear river will appear before our eyes.

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