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引黄灌区是黄河下游的冲积平原,由于黄河河床高出地面,所以本灌区的地下水位较一般地区高’自从渠道完成,进行灌溉以后,又增加了一个影响地下水变动的因素,致使部分土地已经盐碱化。为了改良本灌区的盐碱地及防止土壤盐碱化,本局自一九五二年十一月着手布置全灌区的地下水观测工作,并自一九五三年三月开始观测,现在全灌区共有地下水观测井266个。但在开始观测的阶段,
The Yellow River Irrigation District is the alluvial plain of the lower Yellow River. As the Yellow River bed rises above the ground, the groundwater level in this irrigation district is higher than that of the general areas. Since the irrigation channel was completed, an additional factor has been added to affect the groundwater movement. As a result, Salinization. In order to improve the saline-alkali land in this irrigation district and prevent soil salinization, this Bureau has started to deploy groundwater observations in the whole irrigation district since November 1952 and has been observing it since March 1953. At present, there are total groundwater observations Well 266. However, at the beginning of the observation period,