自由渗漏灌溉渠道输水损失量计算方法理论探讨  

Theoretical Analysis of Conveyance Loss Calculation Method for Free Seepage Irrigation Channels

作　　者：张晶[1] 程伍群[1] 孟霄[1] 武猛[1] 

机构地区：[1]河北农业大学城乡建设学院,河北保定071001

出　　处：《节水灌溉》2015年第2期58-60,共3页Water Saving Irrigation

摘　　要：灌溉渠道输水损失量在我国农田灌溉水量损失中占相当大比重。从区域水资源角度出发,将自由渗漏梯形灌溉土渠道输水过程中的真实损失量划分为4部分,并提出入渗率达到稳定后渗漏损失量为补给地下水量,可作为灌溉回归水重新抽取利用,非无效损失,不计算在渠道输水损失量之内。然后针对4部分损失量产生机理,分别对其计算方法进行了探讨,并提出用改进后的经验公式进行损失量计算,此研究可为今后进一步研究区域(或灌区)水资源合理开发利用、节水灌溉等相关内容提供技术支持。Irrigation channels conveyance loss accounts for a considerable proportion in the farmland irrigation water loss in China.From the perspective of regional water resources,the real conveyance loss of the free seepage trapezoidal channel is divided into four parts.It is also be put forward that the infiltration loss amount is for the recharge of underground water after reaching steady and can be taken as recovery water and reuse,thus it is not invalid water loss of and should be included in the conveyance loss of channels.Then according to the generation mechanisms of the four parts of loss,the calculation methods are discussed,and the improved experience formula for loss calculation is put forward.This research result can provide technical supports for the further research on regional water resources development and utilization and water-saving irrigation.

关 键 词：区域水资源 灌溉渠道 自由渗漏 输水损失 

分 类 号：TV223.4[水利工程—水工结构工程]