PROGRESS IN GEOGRAPHY ›› 2004, Vol. 23 ›› Issue (6): 90-95.doi: 10.11820/dlkxjz.2004.06.011

• Original Articles • Previous Articles     Next Articles

The Impact of the Land Use Change on the Floodwater Adjustment and Storage ——A Case Study on the Dongting Lake Area

LI Rendong   

  1. Institute of Geodesy and Geophysics, CAS, Wuhan 430077, China
  • Received:2004-10-01 Revised:2004-10-01 Online:2004-11-25 Published:2004-11-25

Abstract:

The research on the land use/cover change and its impact on ecologic environment is one of the frontiers and the hot spots in the globe change research. Based on the Chinese resource and environment spatial-temporal database, and using the Landsat TM, MSS and ETM data which were acquired in the end of 1970's and 1990's respectively, we analyzed the spatial-temporal characteristics of land use/cover changes in the Dongting Lake area, then made an assessment on changes of volume of the adjusted flood and lake water after the land use/cover change. The result shows that, during the last twenty years, the cultivated land decreased by 1.97% of total cultivated land. The construction land and the water area expanded, with an increase of 14.88% and 8.77% respectively. The ability of adjusting the flood water in this area had grown by 6.23×108m3, and the maximum storage capacity of the lake water had increased by 13.01×108m3 due to the land cover changes.

Key words: Dongting Lake area, land use/cover change, remote sensing, the ability of adjusting flood