1985 Immigration policy of Niutoushan Reservoir in Linhai?

1 overview of water resources Taizhou is located in the coastal area of eastern Zhejiang, with a subtropical monsoon climate. It is warm and humid all year round, with abundant rainfall, suitable sunshine and four distinct seasons. Annual precipitation days 140 ~ 180d, and annual average rainfall 1640mm. The main characteristics of water resources in Taizhou city are: unbalanced regional distribution, generally more mountainous areas in the northwest and less coastal areas in the southeast. Taizhou and Wenling and Yuhuan counties account for 54.2% of the city's population, 55.99% of cultivated land, 76.9% of GDP and 7 1.3% of fiscal revenue, and only 28.83% of the city's water resources. Uneven distribution during the year, affected by monsoon climate, most of the precipitation is concentrated in April ~10; Due to the concentration of precipitation, mostly in the form of heavy rain, coupled with the short-term flow at the source of rivers and the concentration of flood peaks, water resources mostly flow into the sea in the form of floods; The interannual variation is great, in which the interannual variation of runoff is more severe than that of precipitation, and the high and low alternate obviously. The ratio of maximum and minimum annual runoff is between 3 and 4, which is greater than the ratio of annual precipitation (2-3). The average water resources in Taizhou for many years is 9.363 billion m3, of which the surface water resources are 9.232 billion m3 and the groundwater resources are 1.3 1 100 million m3. According to the statistical yearbook of Taizhou City in 2002, the population is 5,504,600, and the per capita water resources are 1.700 m3, which is lower than the per capita water resources of the whole province in 2003m3 and close to the warning line of water shortage of1.700m3 ~ 2,000m3/person, which belongs to moderate water shortage. The per capita water resources in Taizhou, Wenling and Yuhuan counties are only 900m3, which is lower than the international standard 1000m3. 2 Present situation of water resources development and utilization After more than 50 years of water conservancy construction, Taizhou has built a large number of water conservancy projects focusing on agricultural irrigation, taking into account flood control, power generation, drainage, industry and domestic water for urban residents. Up to now, large and medium-sized reservoirs 1 1, small (I) reservoirs 7 1, small (II) reservoirs 235, Shantang Reservoir 15000, with a total storage capacity of17/kloc-. The water area of plain river network is 97.3km2, and the normal storage capacity is10.44 billion m3. Water diversion project: 2,998 weirs and dams; Water lifting project: 3,503 electromechanical pumps; Groundwater engineering: There are more than 34,562 mobile wells and civil wells. From the analysis of the present situation of water resources development and utilization in the whole city, the degree of development is high in the south and low in the north. The development degrees of water resources in Sanmenwan District, Lingjiang District and Huangwen District are 9.3%, 1 1.8% and 3 1.5% respectively, and Taizhou City has the highest degree of development and utilization (33.5%). Through the investigation and analysis of the actual operation of various water supply projects, the total water supply capacity of water supply projects in the city is 17? 724.2 billion m3, including surface water supply of 65.438+0.58653 billion m3, underground water supply of 65.438+0.795438+0.80 billion m3, and other water supply of 0.067 1 100 million m3. Surface water is the most important water supply source, with water storage project1321000000 m3, water diversion project10392000 m3 and water lifting project160400000 m3, accounting for 83.3%, 6.6% and1respectively. Judging from the water supply situation in recent years, water storage project is still the main engineering measure to solve the contradiction between supply and demand of water resources in Taizhou in the future; In addition, water diversion and pumping projects can be used as important engineering measures to supplement water shortage. Other water supply sources, such as inter-basin water transfer, sewage treatment and reuse, rainwater and seawater utilization, are the future development direction of water resources. 3 Analysis of Supply and Demand of Water Resources With the sustained development of economy and society, the contradiction between supply and demand of water resources has become increasingly acute, and there are different degrees of resource water shortage, engineering water shortage and pollution water shortage in all counties (cities, districts). Sanmen water source project is small and scattered, and the supporting construction of water supply lags behind. Sanmen Water Source is an important electric energy base (thermal power 4.8 million kilowatts, nuclear power 2× 1 10,000 kilowatts) and port development zone in Taizhou's medium and long-term planning. At present, the scale of water supply is far from meeting the development requirements, and water shortage is engineering water shortage. Xianju, Linhai and Tiantai systems are rich in water resources, with great development and utilization potential and good conditions, but the investment in water resources development and utilization is insufficient, and the construction of water resources projects obviously lags behind the water demand. (p = 95%) The annual water shortage in 2000 was 1.7 1.95 million m3. Taizhou City, Wenling City and Yuhuan County are the areas with the largest population density and the most developed social economy in the city, while the per capita water resources and the average water quantity per mu are the lowest in the city, and the potential of local water resources development and utilization is limited. With the construction of Yuhuan Thermal Power Plant's 2.4 million kilowatt energy base and Jiaobei pharmaceutical and chemical base, water shortage and pollution are becoming increasingly prominent. The annual water shortages in Taizhou, Yuhuan and Wenling (p = 95%) in 2000 and 20 10 were 165 1000 m3 and 27625 m3 respectively. By 2020, when the existing water conservancy projects ensure the industrial and domestic water consumption rate (P = 95%) and the agricultural water consumption rate (P = 90%), the annual water shortage in the whole city will be 386 million m3, of which the annual water shortage in the south will reach 250 million m3. The main ways to solve the problem of long-term water shortage in this city are: inter-basin water transfer, that is, the "first diversion" and "Lin Yin" projects; Coastal reclamation and optical storage projects; Improve the water quality of river network and improve the ability of river regulation; Adjust industrial structure and reduce water consumption; Tap the potential of large, medium and small projects to improve water storage and water supply capacity. 4 Problems in the development and utilization of water resources 4. 1 Poor water resources management system In the practice of water resources management, between departments