Dongjiang River and Shima River, two major rivers in Dongguan, are very cold. Dongjiang Bridge, the stone discharged by enterprises, is 32 kilometers long and divided into north and south, main stream and south tributaries. The north main stream flows into the south tributary of Shiziyang River from Shilong Shijie and Sheng Da in Central Ma Chong, with a total length of 465,438+0 km, while Shilong, Guancheng and Shatian Shiziyang flow into Si, with a total length of 42.7 km. Shima River originates from Dannaokeshan, Tangxia and Zhangmutou Town in Baoan District and flows through the territory. A new river flows into Dongjiang from Qiaotou, with a total length of 88 kilometers and a drainage area of 76 kilometers. 1249 square kilometers, the city's 673 square kilometers, is the largest rainfall and runoff area in the city. The cold current flows from Guanyin Mountain in Dapingzhang, through the Yellow River, Changping River and Chashan River in the gorge, and flows into the tributaries of Southeast River. The river is 59 kilometers long and the drainage area is 59 kilometers. 720 square kilometers, low-lying, surrounded by mountains and rivers in the southeast and northwest, with a catchment area of 170 square kilometers and a floodplain.

Dongjiang has abundant passenger water and good water quality. Rivers in the three major water systems of the Pearl River depend to a great extent on Dongjiang transit passenger water for urban industrial and agricultural use. 65% of the local water resources have been artificially polluted, and the water bodies of reservoirs, water sources and Shima River have not been polluted. The water in Hans is seriously polluted and does not meet the drinking water standard.

The annual rainfall in Dongguan is 2305.7mm, which is in the case of abundant water. The average annual rainfall in the city is more than 36.2% of the average annual rainfall. The total amount of water resources was 306,543.8+0.9 million cubic meters, up 45.4% year-on-year, which was higher than the average total amount of water resources, while the storage capacity of medium-sized reservoirs decreased by 0.26,543.8+0 million cubic meters compared with the previous year. The city's total water supply is 21650,000 cubic meters, up 7.0% year-on-year, and the main water supply is1652,000 cubic meters, up 6.4% year-on-year. 070,000 cubic meters of groundwater exploitation, basically the same as last year.

Urban domestic and industrial water mainly depends on Donghe water source, accounting for about 90% of urban water intake. Domestic and industrial pollution, the water quality of urban streams is not suitable for drinking. The total amount of wastewater discharged in the city was 65.438 0.59 billion cubic meters, an increase of 654.38 0.8% over the previous year.

Water resources bulletin

In 2006, the registered population of Dongguan was 1683 1 10,000, an increase of 2.66 million over the previous year, and the permanent population was 674.88 million, an increase of110,000 over the previous year. The city's annual GDP was 264.263 billion yuan, up by 19.0% at comparable prices. This year, the per capita annual water consumption is 257 cubic meters, a decrease of 65.438+03 billion cubic meters compared with the same period of last year, and the water consumption per 10,000 yuan GDP is 82.5 cubic meters, a decrease of 65.438+06.7 cubic meters compared with the same period of last year.

Salt tide is not obvious. In 2006, there were floods in our city from March to March, and from May to July. The 24-hour rainfall recorded by Shilong (Jia Fan) Hydrological Station on July 16 was 332.0 mm (in case of more than 50 days, the design rainstorm standard); Due to continuous heavy rain, strange rocks along the river and cold current, the water level of Vietnam and Xiakou sluice has been once in more than 20 years. Once the flood design standard is reached, Changping, Dongcheng District, Xia Dong Diversion Canal and Chashan Hengli River embankment are in danger and suffer serious losses. volume of water

A rainy city is a rainy year. The average annual precipitation in the city is 36.2%, of which 2305.7mm, and the increasing rainfall is 24 16. 1mm in Dongjiang District, Dongguan, which is 40.0% higher than the multi-year average in Dongjiang Delta. The rainfall in Dongguan is 2259.6 mm, an increase of 34.5%.

In 2006, the total urban rainfall was 568.4 million cubic meters, the total water resources were 30.65438+0.9 billion cubic meters, the surface water resources were 298.9 million cubic meters, the groundwater resources were 422 million cubic meters, and the repeated calculation of groundwater and surface water was 392 million cubic meters.

4, the reservoir water storage performance

7. The total storage capacity of existing medium-sized reservoirs in Dongguan is about 205 million cubic meters; Type 45 (I) reservoir with a total storage capacity of 654.38+47 million cubic meters; 64 small (II) reservoirs with a total storage capacity of 32 million cubic meters; The reservoir capacity is about 384 million cubic meters.

It accounts for 654.38+0.23 billion cubic meters of the city's reservoir storage capacity, a decrease of 0.6543.8+0.6543.8+0.60 billion cubic meters over the previous year. The total storage capacity of the seven medium-sized reservoirs is 0.7 1 100 million cubic meters, a decrease of 0.2 1 100 million cubic meters over the previous year.

Five water supply quantities

All kinds of water supply projects in the city are 210.65 billion cubic meters, and reservoir water supply is10.96 billion cubic meters, accounting for 9. 1% of the total water supply. The actual water volume is 3 million cubic meters, and the total water supply of the water transfer project is 13.9%. The water lifting project is 654.38+66.9 million cubic meters (including groundwater), accounting for 77.0% of the total water supply. Water is 2 158 billion cubic meters of surface water and groundwater, of which 0.07 billion cubic meters.

The daily water supply capacity of urban waterworks is 4.8 million cubic meters, which is about 654.38+652 billion cubic meters of the total annual water consumption.

Liu Shui consumption

In 2006, the city's total water consumption was 216.5 million cubic meters, of which domestic water consumption was 9010.00 million cubic meters, accounting for 410.6% of the total water consumption (urban water supply was 659 million cubic meters, urban production water consumption was10.77 billion cubic meters, 98 million cubic meters); The ecological environment uses cubic meters of water, accounting for 4.0% of the total water consumption.

seven

The city's total water consumption is 565.438 billion cubic meters. Domestic water consumption1480,000 cubic meters, water consumption of 327 million cubic meters and ecological environment water consumption of 35 million cubic meters.

Eight wastewater discharge

The wastewater discharge of municipalities directly under the Central Government is 65.438+0.59 billion cubic meters, of which the cooling water discharge of DC thermal power plant is 0.65438+0.20 billion cubic meters.

Jiushui authority

By the end of 2006, in 439 years, the city approved the water intake permit 13 households, and cancelled 2 1 household. The newly approved water intake is 20136,600 cubic meters, of which 7 are industrial water and 5 are mixed water.

X. Water conservancy law enforcement

In 2006, the Municipal Water Supervision Detachment handled 69 water incidents, inspected 48 ships of various types (75 ships in total), investigated and dealt with 0/2 illegal water plants damaged by dams, cleaned up illegal buildings, packed them, and went to the riverside to build stones and rubble when the reservoir was occupied. 9. Notice of stopping illegal investigation. The total amount of penalty is 310.5 million yuan.

1 1 Overview of water environment

According to the monitoring results of various river sections in 2006, the reservoir water quality evaluation is as follows:

1, the overall water quality at the bridgehead of major rivers is relatively stable all the year round, with good water quality. In a special period, some indicators, such as iron and fecal coliforms, exceed the standard, and other indicators can basically meet the requirements of drinking water.

2. The water quality of Shilong River, Shilong South River and Shilong North River is generally good, except that ammonia nitrogen and iron are relatively stable and slightly increased, other indicators can basically meet the requirements of drinking water.

3. The water quality of the tributary rivers south of the Yangtze River is generally poor, especially the ammonia nitrogen, iron, special period and fecal coliforms exceed the drinking water demand.

4. The water quality in the river network area of Dongjiang Delta is poor, mainly due to the breakthrough of dissolved oxygen, five-day biochemical oxygen demand and ammonia nitrogen.

5. The water quality of the reservoir is good, especially the water quality of Maoshui Reservoir and Qiyeshi Reservoir reaches Class III and Class IV Xiagongyan Reservoir, Huangniupu Reservoir and Henggang Reservoir.

12。 Important water

1, 1, May 12 The 11th executive meeting of the 13th People's Publishing House in Dongguan City, Guangdong Province passed the amendment, which is hereby promulgated for implementation.

2. On February 20th, the tidal sluice project of Houjie Waterway officially entered the construction stage, with a total project cost of about120,000 yuan.

3. On February 23rd, Dongguan Water Resources Department was awarded as "Advanced Collective of Water Resources Management in Guangdong Water Resources System in 2005".

4. On March 15, Dongguan held a networked water supply project for Dongjiang Reservoir, and the water resources assessment report passed the examination of the Ministry of Water Resources. The groundbreaking ceremony will be held on February 29th 18 at the networked water supply project for Dongjiang Reservoir next to the Gefu Gymnasium in Port-au-Prince, Songshan Lake.

5. This year's World Water Day "China Water Week", Dongguan Water Conservancy Bureau launched an investigation activity of Dongjiang water resources along the river from April 2 to April 5. More than 50 representatives from the Municipal People's Congress, CPPCC, environmental planning, water affairs and some media attended.

On the afternoon of June 8, Vice Minister Jiao Yong of the Pearl River Basin Flood Control and Drought Relief Inspection Team of the Ministry of Water Resources led Zhou Wang Bingnan, Deputy Secretary-General of the provincial government. On Sunday, Liu Zhigeng, secretary of the municipal party committee, Li Xiaomei, deputy mayor, and Dongguan Water Resources Department inspected the water resources department. Liu Quan accompanied the inspection.

7. In March and May this year, Typhoon Pearl 16- 17 (0601) affected the city, and the gust was about 6-7. /& gt； From February/Kloc-0 to 22nd, August and May, there was a general rainstorm in our city. In the morning, serious floods occurred in towns and villages in this city.

9, 7, 14 to 17, affected by the strong tropical storm "Bilis" and the trough of low pressure, the whole city was flooded with heavy rain, and some towns and villages were baptized. The 24-hour rainfall of Shilong Town Meteorological Station was 399.6 mm (the standard design of once-in-a-century rainstorm), and a fan cover was installed. The daily rainfall of hydrological station 16 is 332.0mm (exceeding the design rainstorm standard of 50-year return period).

10,11.1.08 Our city, led by Peng Zeying, Deputy Director of the Water Resources Department of the Provincial Department, won the first prize of "Inspection and Appraisal of Advanced Units in Urban and Rural Water Conservancy Disaster Prevention and Mitigation Project Construction in 2006".