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为了提高水利效益,必须对已运用的水利工程效益计算有一个可行的计算办法。这个问题在我们浙江省尚未很好解决,现就南山水库灌溉效益计算,提出一些看法。一、灌溉效益的主要因素浙江地处东南沿海,年降雨量1200～2200毫米,年际之间和年内分布很不均匀。浙江农业的主要作物是双季稻。影响农作物产量的因素是很复杂的,总的可以分为土壤、气候自然条件、水利灌溉条件、农业技术措施条件等。根据这些,在灌溉效益计算时应考虑以下三个因素。
In order to improve the efficiency of water conservancy, it is necessary to calculate the available water conservancy project has a viable calculation method. This problem has not been well solved in our province of Zhejiang Province. Now we put forward some opinions on the calculation of irrigation benefits for Nanshan Reservoir. First, the main factor of irrigation benefits Zhejiang is located in the southeast coast, annual rainfall of 1200 ~ 2200 mm, between years and during the distribution is very uneven. Zhejiang’s main crop is double crop rice. The factors that affect crop yield are complex and can be divided into soil, natural climatic conditions, water irrigation conditions, agricultural technical conditions and so on. Based on these, the following three factors should be considered when calculating irrigation benefits.