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作为天然水资源的河川径流,尚须经过各类水利工程设施的运行、工作,才能全部或部分地提供给人们利用。如为满足灌溉等河外用水部门的需要,必须建造一系列蓄水、引水和提水工程;为满足水电站发电的需要,必须建造蓄水或引水建筑物,溢洪或泄洪以及过鱼、过船等一系列设施;即使如航运等河内用水部门,也要通过建造港口、码头、整治河道等工程,方能实施对水资源的开发利用。凡是由各类工程所提供的水量称为工程供水量。现阶段开展的供水量调查和预测,一般指蓄水、引水和提水工程而言。一个地区内有很多大小不一的水利工程,每项工程都能提供
As the runoff of natural water resources, it is still necessary to go through the operation and work of various types of water conservancy engineering facilities to provide them, in whole or in part, to people. A series of water storage, diversion and water extraction projects must be constructed to meet the needs of water supply departments outside the river such as irrigation. To meet the needs of hydropower generation, water storage or diversion structures, overflow or flood discharge, over-fishing, Ships and a series of facilities; even if such as shipping Hanoi water sector, but also through the construction of ports, docks, river courses and other projects, in order to implement the development and utilization of water resources. All types of water provided by the project is called the amount of water supply. The survey and forecast of water supply carried out at this stage generally refer to impoundment, diversion and extraction works. There are many different sizes of hydraulic projects in a region, each project can provide