THE SIMULATED STORAGE CAPACITY OF FLOOD AND WATERLOGGING IN THE TYPICAL AGRICULTURAL REGION IN JIANGHAN PLAIN

Key words: 
• Jianghan Plain /
• storage capacity /
• simulation /
• agricultural region

Abstract: The Jianghap plain is one of the important bases of China＇s agricultural productivity, located in central and southern Hubei province in the middle reach of Yangtze River. The Jianghan Plain is the one region of flood and waterlogging occurring frequently. The area is low-lying and is characterized by deep alluvial deposits, many smaller rivers and numerous larger and shallow lakesformed by meandering of the Changjiang(Yangtze) River. The alluvial plain is a honeycomb of waterways bordered by natural levees, and the depressional areas encompassed by these waterways are dish-shaped in cross-section. The systems of rivers and lakes are main wetland types in this area. Owing to wetlands in Jianghan plain-lake district fulfill the function related to the flood regulation, the estimating of the storage capacity is useful tocontrolling and reducing the disasters of flooding and waterlogging. In this paper, by selecting typical experimental area, based on its DEM, the relation among the water level, area and volume of inundation in the typical region is defined by using regression analysis. Based on the agricultural cultivating line in this region and the experiment result of bearing the inundation for crop, we define the storage capacity of the typical region in Jianghan Plain - Lake district.