自然条件与击实条件下渠系水利用系数对比分析——以石佛寺灌区为例

Canal System Water Utilization Coefficient Comparison under Natural Conditions and Compaction Conditions: a Case Study in Shifosi Irrigation District

石佛寺灌区是沈阳市最大的电力提水灌区,为了得出在不同条件下石佛寺灌区的渠系水利用情况,文章通过室内试验和田间试验,结合气象等资料,对石佛寺灌区各级渠道在自然条件和击实条件下的渠系水利用系数进行分析,首先计算出该灌区各级渠道的渠系水有效利用系数,然后通过各级渠道水利用系数的乘积来计算不同条件下灌区综合渠系水有效利用系数。最后对两种条件下的渠系水利用系数进行对比分析,得出在击实条件下灌区的渠系水利用系数更高。因此可以采取加固、击实、衬砌等方法来提高土壤的致密性,从而减小土壤的渗透系数以提高灌区的渠系水利用系数。

The canal system water utilization coefficient of Shifosi irrigation district of Shenyang city under natural conditions and compaction conditions is compared by laboratory test and field trial. The canal system water utilization coefficients of every channel of the district were calculated,by which the integrated water utilization coefficient of the system was obtained as the product of the coefficients. It was found that the canal system water utilization coefficient under compaction conditions was higher. It is concluded that methods to improve the compactness of ths soil should be taken so as to reduce the soil permeability.