What is the principle of water source selection for rural drinking water safety project?

Do a good job in optimizing the allocation of regional water resources and give priority to ensuring high-quality drinking water sources. If there is no suitable water source in the local area, the water source can be selected in a larger area in combination with the construction of centralized contiguous and moderate-scale water supply projects. When planning the water source of rural water supply projects, we should make full use of the existing local water conservancy projects such as water diversion and storage. If conditions permit and necessary, small and medium-sized reservoirs can also be built as rural water supply sources in combination with flood control and drought relief planning. The site selection of the water plant should conform to the overall planning of the town (township) village, and be determined comprehensively according to the following requirements: the layout of the water supply system is reasonable, it is not threatened by floods, the terrain is fully utilized, the earthwork volume is reduced, it is generally close to the water use area, the investment is saved as much as possible, the operating cost is reduced, the engineering geological conditions are good, and the sanitary environment is good. It is convenient to set up protective belts, with less demolition and less occupation of fertile land, which meets the short-term and long-term layout of water plants. The general layout of the water plant shall meet the following requirements: production buildings (structures) and ancillary buildings shall be arranged separately. 2) The living area should be arranged separately from the production area. 3) When constructing by stages, the short-term and long-term should be coordinated. 4) The area and composition of the production annex should be determined according to the scale, technological process and economic conditions of the water plant. 5) The dosing room and disinfection room should be close to the dosing point and adjacent to the drug warehouse; The disinfection room and its warehouse should be located in the downwind direction of the water plant, and should keep a safe distance from the duty room and residential areas. Stacking sites for filter materials and pipe fittings shall be set separately as required. ! The distance between toilets and septic tanks and production buildings (structures) should be greater than 30 melons, and dry toilets and seepage toilets are not allowed. 8) Waterworks should consider greening, and its area should be determined according to scale, site and economic conditions. 9) Simple roads leading to buildings (structures) should be set as required, and rainwater drainage measures should be taken. 10) Waterworks shall be equipped with gates and fences, and the height of fences shall not be less than 2 1 1) The process shall be vertically arranged according to the elevation, so as to reduce the land occupation and utilization of raw water pressure, and reduce secondary lifting. The layout of production structures and water purification devices shall meet the following requirements:

1) The elevation layout should make full use of the original topographic conditions, and strive for smoothness, low energy consumption and earthwork balance.

2) Multiple groups of water purification structures should be arranged in parallel and evenly distributed.

3) The spacing between structures should be compact, but it should meet the requirements of construction, operation and maintenance. 0 connecting channels should be set between structures, and combined layout should be adopted as far as possible when conditions permit.

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