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 Wysłany: Wto 4:57, 05 Kwi 2011 Temat postu: South County Water Resources Development Le Survey |
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South County Music Survey Water Resources Development
Infiltration, river side of the infiltration, irrigation volume and return. Infiltration of river side of the yellow water main lateral seepage I will not repeat calculations, comprehensive sets of groundwater recharge in Table 10 Table I: Comprehensive sets of different frequency of groundwater recharge unit: million cubic meters Frequency 1p20% D = 50 % D = 75% p = 95% level at the end of platform supply drama 106456798396237342412l83168 (2) of groundwater allowable withdrawal: Based on the principle of water balance, groundwater allowable withdrawal is equivalent to less groundwater recharge comprehensive platform for evaporation, the Southern Music County groundwater depth is far greater than the depth limit evaporation, evaporation of underground quasi-mouth Sun Technology Policy Research PuYANGKEJI Table II: Southern Music b! County water supply and demand balance of different development rates of pregnancy to ensure availability of surface and subsurface water resources in the Yellow River water requirements of livestock Total units lack the amount of total P were agricultural water of water the size of the population, 20005o% l08479798392864187l83133288011317436533587870.420105o% 10847.97% 39286421464912 6370001509639863504lo6170 diving does not work if there is no evaporation phenomenon. Therefore, groundwater allowable withdrawal amount is equal to integrated supply. (3) groundwater storage: refers to the gap in the capacity of the aquifer of still water. This water is generally not considered as water resources, if used will result in water level, aquifer dewatering, it is ignored. 3, the water quality of surface water except the South County music Wei River heavily polluted, not as a water source, the other surface water and I have yellow water for agricultural irrigation. Groundwater salinity in most parts of 1 to 2 grams / liter, water chemistry type is HcO · sO-a ca · Mg-based water and HCO · C1 · SO. ~ Na-Mg-Ca type water, can be used as industrial and agricultural and livestock water supply. Chengguan water zone distribution area Yangcun 30--110 meters,belstaff outlet, groundwater salinity 3 to 6 grams / liter, water chemistry type is CI-SOrNa. Mg-based water and Cl ~ Na · Mg type of water, not suitable for water supply source, only in the seedling stage of crops with water mixed into the water, stop watering seedling stage, so Simiao production. Third, water supply and demand balance points Bunan Lok County groundwater and water supply mainly depends on the Yellow River water. Are Pianku 1995, the industrial and agricultural and drinking water consumption is 202,697,000 cubic meters total. 151.34 million cubic meters of agricultural groundwater extraction (of which 7.567 million cubic meters back underground), 16.2 million cubic meters of water extraction of the Yellow River (of which 78,100 cubic meters back underground.) Real Yellow 28.64 million cubic meters that year, rainfall infiltration 57,323,000 cubic meters, irrigation return the amount of 8.377 million cubic meters, the total volume of 94.34 million cubic meters of water supply, supply and demand balance, status of 108,357,000 cubic meters of water meters of drinking water supply as industry and agriculture and the long-term exploitation of groundwater, leading to a sharp decline in the county water table, the formation of groundwater depression cone, funnel center depth of the water level 2O. 57 meters. The county before 1988 decreased 0.5 m water table. Zhen Yang Technology 1988PUYANGKEJ1 years after the county west and northwest is still in the water level drop of about 0.5 meters. Other parts of the Yellow River irrigation increases, the relative reduction of groundwater extraction, groundwater recovery, albeit slowly, down the wave state. Fourth, water supply and water supply and demand principle Nanle contradiction to current situation of water resources for water supply resources, 2000 and 2010, two development phases of the supply-demand balance forecast, water shortages are still very serious. Fixed water consumption in 2000: Population 65 liters / person-days, large livestock 52 l / head day, Xiaoxu 20 liters / head day; Industrial 120 cubic meters / million; agriculture 55 cubic meters / mu meeting in 2010: Population 80 liters / man-days; large animals 42 l / head day; Xiaoxu 16 l / head, Industrial 70 cubic meters / million, agriculture 45 cubic / mu time for the South County music a serious shortage of water resources, in particular the following points measures and proposals: 1, increase the amount of the Yellow River. That is, in the first and second water supply project south of Pu Qing increase water supply based on the Yellow River, Qing Pu south as soon as possible recharge the third project. Volume of the Yellow River is expected to reach 3,000 --- 50 million cubic meters, to ease the county west, northwest serious water shortages. 2, to develop water-saving irrigation projects, construction of water-saving agriculture, in order to reduce the exploitation of groundwater. 3, provide additional filling stations of different sizes, increase the utilization of the Yellow River water. 4, strengthening the governance of industrial waste and improve the utilization of industrial wastewater. A 13 - |
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