摘要
以新疆农七师127团灌区为研究对象,通过区域水盐监测、水盐平衡计算与分析,对现有水盐状况是否满足盐分控制要求作出评价。研究结果表明,现状的水盐平衡条件不能满足控制盐分要求,其中引进的盐分只有大约40%从平衡区内排出,有60%左右的盐分滞留在平衡区内,其结果势必加重区域内土壤盐渍化的程度。如果按现状灌排条件和灌溉用水水质状况预测,每年1.5m深土壤剖面的平均积盐量约为0.037%。为保持研究区水盐的持续平衡状态,水量排引比需达到0.3左右。为此,在进一步加强明沟排水系统建设的同时,需增设田间暗管排水。
Based on the irrigation district, 127 group, seventh division commander, Xinjiang Province, the available water-salt regime was evaluated and the countermeasures were proposed through water-salt monitoring and balance calculation. The results showed that the available water-salt conditions can not meet the need of controlling salinity. About 40 percent of salinity diverted into irrigation district was drained out; however, 60 percent of salinity was maintained. Such result will certainly aggravate the degree of soil salinization in the study region. Under the condition of available irrigation and drainage system, and irrigation water quality, it is forecasted that the average salinity accumulation in 1.5 m depth soil profile every year will be about 0. 037%. In order to maintain the sustainable baiance of water-salt in the study region, it is proposed that the ratio of drainage and water diverted should be about 0. 3, the function of draining salinity was enhanced by increasing subsurface pipe based on available open-ditch drainage engineering.
出处
《中国农村水利水电》
北大核心
2006年第4期12-15,共4页
China Rural Water and Hydropower
基金
国家"十五"重大科技专项的部分内容(2002AA2Z4201-5)
关键词
盐渍化
水盐平衡
排引比
排水工程
Salinization
Water-sah balance
Ratio of drainage and water diverted
Drainage engineering
