River conditions in Jinzhou in 2006

In 2005, our city was a normal year. The city's average precipitation was the same as the multi-year average, 1.3% less than in 2004. The city's surface water resources amounted to 717 million cubic meters, 12.4% less than the multi-year average. The city's small and medium-sized reservoirs have slightly more water than last year. The water storage capacity of four medium-sized reservoirs has increased by 17.29 million cubic meters. The groundwater level in the plain areas continues to rise. The total water supply throughout the year is less than last year. The water quality of various rivers There is no significant improvement compared with last year.

1. Amount of water resources

(1) Precipitation: The city’s average precipitation in 2005 was 563.1 mm, equivalent to 5.647 billion cubic meters of water, which was the highest since 2004. ’s second flat year. There is very little precipitation from January to March throughout the year, and the rainfall distribution in the rest of the period is more suitable for farming, and agricultural production has achieved a bumper harvest.

Distribution within the year: There is more precipitation in May and June, especially in May, which is about three times the multi-year average. The annual precipitation is mainly concentrated from May to August, and the precipitation from September to December is relatively low. few. Among them: the precipitation from January to February was 6.7 mm, which was the same as the multi-year average; the precipitation from March to May was 163.1 mm, more than double the multi-year average; and the precipitation from June to September was 427.9 mm. , the same as the multi-year average, accounting for 68.8% of the annual precipitation; the precipitation from October to December was 23.9 mm, 44.8% less than the multi-year average.

Regional distribution: From the perspective of basin distribution, the average precipitation in the Rayang River Basin is 561.0 mm, 1.3% less than the multi-year average, which is a normal year; the average precipitation in the Daling River Basin is 528 mm .4 mm, 6.2% less than the multi-year average; the average precipitation in the Xiaoling River Basin is 633.2 mm, 15.1% more than the multi-year average, indicating a wet year; the average precipitation in the coastal Xingshan area 512.9 mm, 14.4% less than the multi-year average, indicating a dry year.

From the perspective of administrative district distribution, the average precipitation in the urban area is 659.9 mm, which is a wet year; the average precipitation in Yixian County is 588.2 mm, which is a wet year; the average precipitation in Linghai City is The precipitation was 568.2 mm, basically the same as the multi-year average, and it was a normal year. The precipitation in Heishan County and the former Bac Ninh City was 528.5 mm and 549.3 mm respectively, which was a dry year.

(2) Surface water resources 1. Amount of surface water resources. The amount of surface water resources refers to the dynamic water amount of surface water bodies such as rivers, lakes, and glaciers, which is represented by natural runoff. In 2005, the city's surface water resources were 717 million cubic meters, equivalent to an annual runoff depth of 71.5 mm, 12.4% less than the multi-year average.

Compared with the multi-year average, the amount of surface water resources in each river basin is 313 million cubic meters, 15.5% higher than that of the Rayang River; the amount of surface water resources of the Daling River is 239 million cubic meters, 15.5% higher than the average. 15.0% less; Xiaoling River's 153 million cubic meters, 36.1% less; coastal areas 013 million cubic meters, 53.8% less.

2． Reservoir water storage capacity. The city's water storage capacity of small and medium-sized reservoirs at the end of the year increased compared with the end of the previous year. The total water storage capacity of medium-sized reservoirs was 39.5 million cubic meters, an increase of 17.29 million cubic meters compared with the end of the previous year. However, the overall water storage capacity of the reservoirs was still seriously insufficient, far from reaching Its design water storage capacity.

(3) Groundwater resources 1. Amount of groundwater resources. The amount of groundwater resources refers to the dynamic amount of water that is recharged by precipitation and surface water infiltration into the groundwater aquifer. In 2005, the city's groundwater resources were 856 million cubic meters, of which the groundwater resources in hilly areas were 271 million cubic meters and the groundwater resources in plain areas were 705 million cubic meters. The hilly areas and plain areas were double counted. The volume is 120 million cubic meters.

2． Groundwater dynamics. As the precipitation for two consecutive years was relatively close to the multi-year average, most of the groundwater levels in the region increased in 2005, with the average groundwater level in the region rising by about 0.39 meters. Among them, the underground water stations with relatively large increases include: Xuetun Station in Heishan County increased by 1.31 meters; Linghai City increased by 2.39 meters; and Juliangtun Station in Yixian County increased by 1.35 meters. There are not many sites where groundwater levels have dropped, and the decline has been very small, not exceeding 0.30 meters.

3. Seawater intrusion. By the end of 2005, the city's seawater intrusion area was 176.7 square kilometers, mainly concentrated in Linghai Jianye, Yanjia and other towns.

(4) Total amount of water resources Total amount of water resources refers to the total amount of surface and underground water produced by precipitation (excluding the duplication of the two).

In 2005, the city's total water resources were 1.299 billion cubic meters, 7.4% less than the multi-year average, and an increase of 393 million cubic meters compared with 2004. Among them, the amount of surface water resources is 717 million cubic meters, the amount of groundwater resources is 856 million cubic meters, and the repeated calculation of surface water and groundwater is 274 million cubic meters.

2. Water Resources Utilization

(1) Water Supply Quantity Water supply refers to the gross water supply provided by various water source projects to users, including water transmission losses. In 2005, the city's total water supply volume was 775 million cubic meters, including 64 million cubic meters of water supplied to outer districts (Fuxin, Panjin, and Huludao City). Among them, the surface water supply is 35 million cubic meters, accounting for 4.6% of the total water supply; the groundwater supply is 740 million cubic meters, accounting for 95.4% of the total water supply. Among the surface water supply, the water supply volume of the water storage project was 00.5 billion cubic meters, accounting for 1.4% of the surface water supply volume; the water supply volume of the water diversion project was 0.35 billion cubic meters, accounting for 98.6% of the surface water supply volume. . Among the groundwater supply, the deep water supply is 012 million cubic meters, accounting for 1.6% of the groundwater supply; the shallow water supply is 728 million cubic meters, accounting for 98.4% of the groundwater supply.

(2) Water consumption Water consumption refers to the gross water consumption allocated to users, including water transmission losses. In 2005, the city's total water consumption was 711 million cubic meters, of which: farmland irrigation water consumption was 396 million cubic meters, accounting for 55.6% of the total water consumption; forestry, animal husbandry and fishery water consumption was 46 million cubic meters, accounting for 55.6% of the total water consumption. 6.5% of the total water consumption; urban domestic water consumption is 76 million cubic meters, accounting for 10.7% of the total water consumption; rural domestic water consumption is 35 million cubic meters, accounting for 4.9% of the total water consumption; industry Water consumption was 159 million cubic meters, accounting for 22.3% of the total water consumption.

The water consumption of various industries in the city is shown in the figure.

(3) Water consumption Water consumption refers to the amount of water that is consumed in the process of water transportation and water use and cannot return to surface water bodies or underground aquifers. In 2005, the city's actual water consumption was 431 million cubic meters, and the comprehensive water consumption rate was 61.0%. Among them, farmland irrigation consumes 232 million cubic meters of water, which is a large water consumer, with a water consumption rate of 59.0%; forestry, animal husbandry, and fishery consume 044 million cubic meters of water, with a water consumption rate of 94.0%; urban domestic water consumption is 0. 4.1 billion cubic meters, a water consumption rate of 54.0%; rural domestic water consumption is 34 million cubic meters, a water consumption rate of 98%; industrial water consumption is 080 million cubic meters, a water consumption rate of 50.0%.

3. Water Quality Overview

(1) Wastewater Discharge In 2005, the city’s wastewater discharge was 108.2 million tons, of which 31 million tons were discharged to Daling River, accounting for 28.7% of the city's total wastewater discharge; 77.2 million tons of wastewater was discharged into Xiaoling River, accounting for 71.3%.

(2) Main pollutant discharges. In 2005, the city’s total pollutant discharges were 101,000 tons, of which 78,000 tons were discharged to the Daling River. The main pollutants were suspended solids. 24,200 tons, the five-day biochemical oxygen demand is 14,000 tons, and the chemical oxygen demand is 31,100 tons. 22,600 tons of pollutants were discharged into the Xiaoling River. The main pollutants were suspended solids (5,860 tons), five-day biochemical oxygen demand (5-day biochemical oxygen demand) of 3,200 tons, and chemical oxygen demand (12,800 tons). The evaluation results show that after part of the urban waste sewage is treated by the sewage treatment plant, the amount of pollutant discharge has been significantly reduced, and it has basically reached the national comprehensive sewage discharge standard.

(3) Surface water quality The Da and Xiaoling rivers, the larger rivers flowing through Jinzhou City, are seriously polluted. This time, the "Surface Water Environmental Quality Standard (GB3838-2002)" was used to evaluate the river water quality according to the wet season (June-September) and dry season (January-May, October-December). The evaluation parameters were PH, dissolved Oxygen, permanganate index, five-day biochemical oxygen demand, ammonium nitrogen, copper, fluoride, arsenide, mercury, cadmium, hexavalent chromium, lead, cyanide, volatile phenol, 14 items, the representative value of the evaluation parameter concentration is selected average value.

1. Daling River Water Quality The Daling River is evaluated to be 237 kilometers long, of which the tributary Xihe is 83 kilometers long and represents 3 river sections. During the wet season: the Yixian section of the main stream of the Daling River has Class III water quality; the Linghai section has Class V water quality; and the Fuxingbao section of the tributary has Class V water quality. During the dry season: the water quality of the Yixian section is Class V; the water quality of the Linghai section and Fuxingbao section is super Class V.

2． Xiaoling River Water Quality The Xiaoling River is 105 kilometers long and has two representative river sections.

During the wet season: the water quality in the Gangyaokou section is Class III, which meets the surface water environment quality standards; the water quality in the Jinzhou section is Class V. During the dry season: the Jinzhou section has water quality exceeding Class V; the Gangyaokou section has Class V water quality.

The evaluation results show that: out of the total river length evaluated of 342 kilometers, the river with water quality exceeding Category V is 57 kilometers long during the wet season, accounting for 16.7% of the total river length evaluated; the river with water quality exceeding Category V is 128 kilometers long. , accounting for 37.4%; the river with Class III water quality is 157 kilometers long, accounting for 45.9%. During the dry season, the length of the river exceeding Class V water quality is 185 kilometers, accounting for 54.1%; the length of the river exceeding Class V water quality is 157 kilometers, accounting for 45.9%.

The main pollutants in the Da and Xiaoling Rivers are five-day biochemical oxygen demand, permanganate index, ammonium nitrogen, volatile phenols, fluoride, mercury, etc.

(4) Groundwater quality In 2005, the water quality of 9 conventional groundwater wells in the city was analyzed. The evaluation standard was groundwater quality standard (GB/T14848-93). The evaluation results showed that the water quality of most groundwater wells was relatively low. Good, meets groundwater quality standards. However, there is pollution in some areas. The items exceeding the standard include ammonium nitrogen, nitrite nitrogen, and nitrate nitrogen, which should be paid attention to.

IV. Forecast of water supply and demand in the first half of 2006

Based on the water resource status in 2005 and the water quantity forecast in the first half of 2006, the city's water supply in the first half of 2006 is 4.35% billion cubic meters, of which 21 million cubic meters are available for surface water and 414 million cubic meters for groundwater.

It is estimated that the city’s water demand in the first half of 2006 was 455 million cubic meters. Among them: agricultural irrigation water demand is 278 million cubic meters, forestry, animal husbandry and fishery water demand is 35 million cubic meters, industrial water demand is 086 million cubic meters, urban public water demand is 012 million cubic meters, and residential water demand is 0. The water demand is 43 million cubic meters and the ecological environment water demand is 016 million cubic meters. The balance of water supply and demand is analyzed by administrative division. Linghai City has a relatively large water shortage of 0.5 billion cubic meters, which is mainly reflected in the shortage of resources in the large and small Linghe River fans. There is a water shortage of 0.27 billion cubic meters in the urban area, mainly in the water used for agricultural production in the suburbs. The water supply and demand in the remaining counties are basically balanced.

Important water issues in 2005

1. Fulfill responsibilities, actively prepare for war, and fight against floods

During the 2005 flood season, the average rainfall in the province was 10-20% higher than normal. The water potential of rivers in our city rose, and there was a high possibility of heavy rains and floods. . To this end, we adhere to the principle of "grasp it early, catch it hard, and hurry up" to do a solid job in this year's flood prevention work. According to the flood control responsibilities and areas under its jurisdiction, the Municipal Flood Control Headquarters has formed a flood control leadership system consisting of administrative leaders and emergency rescue personnel composed of leaders of the municipal government and leaders of the Municipal Water Conservancy Bureau, and technical leaders composed of mid-level cadres of the Municipal Water Conservancy Bureau. Each responsible person will carefully inspect the flood relief work and implement the flood relief plan according to their respective areas of responsibility.

2． Build a linear park on the left bank of the Daughter River and pay close attention to the Daughter River improvement project

In order to complete the Daughter River linear park project, in June, our bureau started the Daughter River improvement project. The project is located on the left bank of the Nuer River from Jinchao Expressway to Jinhu Highway. The embankment is 3.9 kilometers long, of which the original earth embankment is heightened and thickened by 1 kilometer, and 2.9 kilometers of newly built earth embankments are built; from the Jinhu Highway Bridge to the Nuer Henan Bridge Section, the original earth embankment was heightened and thickened by 2.83 kilometers. The project has completed the construction of earth embankment with 200,000 earthworks and an investment of 3 million yuan. It is now completed.

3. Prevent seawater intrusion and protect the water resources of the large and small Linghe River fans

In order to protect the water sources of the large and small Linghe river fans, our bureau has started preparatory work to prevent seawater intrusion since the beginning of the year. The first phase of the project has been completed, effectively preventing seawater from intruding into the upstream water source along the Xiaoling River. The feasibility study report of the second phase of the project has passed the technical review of the Provincial Department of Water Resources on November 1, and is currently applying for approval from the Provincial Development and Reform Commission. The construction of the second phase of the project will start in April 2006 and is expected to be completed in October. The total investment of the entire project is expected 36 million yuan.

4． Pay close attention to the construction of rural drinking water and water improvement projects to ensure that people can drink safe and reliable water

Up to now, 58 new water source wells have been built, equipped with 58 sets of water pumps, and 58 well houses have been built, benefiting the number of households 4,850 households, 16,200 people, 4,000 large livestock, completed investment of 3.43 million yuan.

Anti-fluoride water reform completed the construction of 54 water plants, equipped with 54 sets of water pumps, 30 microcomputers, 9 pressure tanks, erected 18 kilometers of high and low voltage lines, laid 220.3 kilometers of pipelines, and solved 95 natural villages, 17,971 households, 64,032 people have access to qualified water. An investment of 13.13 million yuan was completed, of which 9.32 million yuan was subsidized by the province and 3.81 million yuan was self-raised.