Present Situation and Control Research of Coastal Saline-Alkali Fields in China

With the fast economy development in coastal regions, China, some water and soil environmental problems appear, such as that salt water fill in the soil where is fill-building fields, sea water invading into inland while groundwater decrease, and so on. In these areas, the eco-environmental conditions and underground constructions are impacted by the soil saline-alkali. This study presents the control measures of Coastal Saline-alkali Field Control, of which the main contents are as follows:(1) to understand the reasons of Saline-alkali formation, (2) to develop the control measures including: water conservancy, vegetation methods, biologic and chemical measures, etc. (3) to analyze the economic, social and environmental benefits generated by meliorating Saline-alkali soil. However, the relations between the soil salinization and the natural or human influence are not clear. What we need to do is to develop new desalination measures, such as making full use of rainwater during flood seasons, and carry on benefit recognition and quantitative evaluation for the benefit brought by meliorating Saline-alkali soil.