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一渠道渗漏损失计算(一) 基本情况我省大、中型灌溉工程的渠道渗漏严重,其渠系水利用系数一般在0.4左右,最低值不足0.3。为了提高渠道水利用系数,各地对干、支两级渠系采用各种类型的衬砌工程,包括现浇混凝土,预制混凝土块,浆砌条石,浆砌块石、三合泥以及三合泥垫底上加盖石。据观测资料分析我省渠系水利用系数较中水部规范规定相差甚大,从水资源的利用和水利工程来看,都必须讲究渠道衬砌效益。综合我省山区灌溉工程的地形地质来看,干渠多跨溪穿岗,地势较高,地质多风
Calculation of Seepage Loss in Channels (I) Basic Conditions The channels of large-scale and medium-sized irrigation projects in our province have serious seepage. The water use coefficient of the canal system is generally around 0.4, and the minimum value is less than 0.3. In order to improve the coefficient of channel water utilization, various types of lining works are used for dry and branch canal systems in various places, including cast-in-place concrete, precast concrete blocks, masonry stone, masonry stone, trigeminal mud and trigeminum Bottom stamped stone. According to the observation data analysis, the coefficient of water utilization of drainage system in our province is quite different from the norms of the Ministry of Water Resources. Judging from the utilization of water resources and water conservancy projects, the efficiency of channel lining must be paid attention to. According to the topography and geology of irrigation projects in mountainous areas of our province, the main channel runs through the river more widely, with higher terrain and windy weather