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1.勘察水源修建小型水库(塘坝)之前,首先要摸清水源,搞清山沟或小河流的最大、最小、正常流量和全年来水量,以便确定库(塘)规模,确保安全,更好地为农牧业生产服务。多数山沟或小河缺乏实测水文资料,同时,库(塘)水量的主要水源是降雨产生的径流。因此,来水量可通过集雨面积并配合水文图集来计算确定。集雨面积是指坝地以上分水岭所包围的面积;水文图集是某一地区,根据已有水文站点的实测资料,把一些水文特征值绘制在地图上的等值线图。在没有实
1. Survey of Water Resources Before building a small reservoir (pond dam), first of all, it is necessary to find out the source of water and find out the maximum, minimum, normal flow and annual flow of water in the ravine or stream so as to determine the scale of the pond and ensure the safety and better For the farming and animal husbandry production services. Most of the ravines or streams lack actual measured hydrological data. At the same time, the main source of water for reservoirs (ponds) is runoff generated by rainfall. Therefore, the amount of water can be collected through the catchment area and hydrographs to determine. Rain-collecting area refers to the area enclosed by the watershed above the dam; the hydrograph atlas is a contour map of some hydrological eigenvalues drawn on the map according to the measured data of the existing hydrological stations. In no real