论文部分内容阅读
华北冲积平原除滨海一带和内陆地区某些洼地及其边缘之外,地下水矿化度一般为1～3克/升,本文所探讨的就是这类地区.本地区具有发展农业生产的有利条件.例如:气候温和,地势平坦,土层深厚等等.然而,如所周知,本地区农业生产受到“旱、涝、盐碱”三大自然灾害的严重威胁.为保证本地区农业生产的发展.必须与“旱、涝、盐碱”三大自然灾害进行斗争.采取措施来控制和调节地下水位状况是“旱、涝、盐碱”综合治理工作中的基本内容之一.
The salinity of groundwater in the North China alluvial plain is generally 1 ~ 3 g / L, except in the coastal area and some inland depressions and their margins, which are discussed in this article. The region has the favorable conditions for the development of agricultural production However, as we all know, the agricultural production in this region is seriously threatened by the three major natural disasters such as drought, waterlogging and salinization. To ensure the development of agricultural production in this region, It is imperative to fight against the three major natural disasters such as drought, flood and salinity, and adopting measures to control and adjust the status of groundwater table is one of the basic contents in the comprehensive management of “drought, flood and salinity”.