影响内陆干旱地区沟灌灌水质量的田间因素主要为沟长、 入沟流量以及田面坡度, 本文主要通过Win-SRFR模型对影响沟灌灌水质量的各因素之间正交组合条件下的田间灌溉水有效利用率、 各点入渗水量、 灌水均匀度等评价指标进行模拟, 根据模拟的结果对沟长、 入沟流量以及田面坡度等因素进行优化组合, 提出适合该区域适宜的沟灌灌溉管理方式与影响灌水质量的各因素最佳组合, 模拟表明该地区适宜的沟长为60―80m,当田面坡度控制在1/500以下时, 小于1.0L/s的入沟流量时灌水质量较好, 田面坡度控制在1/1 000 以下时,大于1.0L/s的入沟流量时灌水质量更佳, 通过建立优化组合模型, 通过遗传算法得到该地区适宜的沟灌入沟流量和灌水时间为1.5L/s和38min.%The field factors of influencing the furrow irrigation quality in Hexi inland arid region were irrigation ditch length,flow and slope of field.This paper introduces the imitation of the evaluation of indexes such as the field irrigation water utilization efficiency ,amount of infiltrating water in every spots and the uniformity of irrigation water application ,by means of the WinSRFR model under orthogonal combination.Meanwhile ,based on the imitation results,it optimizes the field factors of furrow irrigation quality and come up with the best combination of these factors to adapt the furrow irrigation management in Hexi area.The results indicated that the appropriate ditch length was 60-80m ,the furrow irrigation quality was good under the field slope was be-ing controlled below 1/500 and the flow was being controlled less than 1.0L/s.The furrow irrigation quality was better under the field slope was being controlled below 1/1000 and the flow was being controlled greater than 1.0L/s.By means of setting up the optimization of combination model and genetic algorithm ,the appropriate flow (1.5L/s) and irrigation time (38min) were confirmed.
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