Temporal-spatial Changes of Water Conservancy Project Land in Chongqing

To explore characteristics of water conservancy project land in Chongqing since directly under jurisdiction.The data of water conservancy project land which from 1997 to 2011 was chosen to analyze temporal-spatial changes for 15 years by excel and ArcGIS.Results showed that，on time dimension，the city′s water conservancy project land mainly showed a trend of first increased after decreased，and reservoir water area accounted for most of land in water conservancy engineering，but water conservancy project construction land showed a trend of increase year by year.On space dimension，the water conservancy project land had increase or decrease different in each districts and counties，but the gap was narrowing trend.The changes of water conservancy projects land，middle and lower reaches of the Yangtze River in Chongqing and the two wings was obvious.Based on analysis of water conservancy project land，the change was more noticeable since directly under the jurisdiction of Chongqing.Because of Three Gorges Project，change was significantly which along the middle and lower reaches of the Yangtze River in Chongqing，and keeping stable level in recent years.Accordingly，it was put forward that water conservancy engineering construction in Chongqing should take the‘five water’as the goal.