重庆市水利工程用地时空变化

为探讨直辖以来重庆市水利工程用地变化特征，选取了1997—2011年重庆市水利工程用地数据，利用Excel和ArcGIS软件，从时空角度分析了15年间全市水利工程用地变化。结果表明，时间维度上，全市水利工程用地主要呈现先增加后减少趋势，水库水面占水利工程用地的大部分，但水利工程建筑用地所占比例呈逐年增大趋势；空间维度上，15年间各区县水利工程用地增减不一，但各区县之间差距有缩小趋势，重庆长江中下游以及两翼区县水利工程用地等级变化比较明显。直辖以来全市水利工程用地变化比较明显，三峡工程的建设使得重庆长江中下游沿岸区县水利工程用地变化明显，且近几年维持在稳定水平，据此提出今后重庆市水利工程建设应以“5个水利”为目标。 

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.