摘要
据银北灌区地下水监测并网资料分析,80年代末期与60年代中期相比,地下水位略有下降,平均降幅0.1～0.2m;地下水矿化度由60年代中期的3.09g/L减少为1.97g/L,表明灌区的盐渍化治理取得一定成效。目前,银北灌区盐渍区面积占耕地面积的50％左右,且由于灌区特殊的自然地理条件,以及水利设施老化、用水定额大、机井抽排滑坡等原因,灌区还存在着土壤盐渍化继续发展的危险,必须采取衬砌渠道、推行合理的灌溉制度、井渠结合灌溉、加强各种排水措施等综合措施进行治理。
According to the analysis of monitoring well network data of ground water in the Yinbei irrigated area and comparing that in the late of the eighties and in the middle of the sixties that the ground water level has been reduced slightly, about 0.1～0.2 meter in average; the degree of mineralization of the ground water has been reduced from 3.09 g/L in the middle of the sixties to 1.97 g/L, showing some effects have been made on salinization management in the irrigated area. At present, the saline area of the Yinbei irrigated region makes up about 50% of the total cultivated area and a latent crisis of salinization of soil of the irrigated area would be continuously developed due to the factors of special natural geological conditions, aging of irrigated facilities, great amount of water consumption and slides caused by pump draining of machinewells. Therefore, canals must be lined and a rational irrigation system of combining the irrigation of well and canal should be carried out. It is to be controlled through comprehensive measures of various drainage measures.
出处
《人民黄河》
CAS
北大核心
1992年第11期33-35,共3页
Yellow River
关键词
地下水
土壤
盐分动态
盐碱土
防治
behaviodr of ground water, soil salt development, management of salinization
