塔里木盆地绿洲分布与河流径流量的关系

Relationship between oases distribution and stream runoff in the Tarim Basin

利用2007年SPOT NDVI数据集对塔里木盆地绿洲进行了提取,估算出塔里木盆地的典型绿洲总面积为54923.86km2,占塔里木盆地总面积约10%;包括典型绿洲和荒漠草原在内的植被覆盖地区总面积101392.56km2,占塔里木盆地面积约18%。基于ArcGIS的距离分析功能,以自然流域为基础,把塔里木盆地绿洲划分成17个区域,并对河流径流量与区域内绿洲面积之间的关系进行了分析,显示河流径流量大小与区域内绿洲分布面积有显著的关系。

Oases in the Tarim basin were extracted using 2007 SPOT NDVI dataset.It was concluded that oases in the Tarim Basin cover an area of 54923.86 km2,making up about 10% of the entire basin;oases and desert steppe together occupy an area of 101392.56 km2,making up about 18% of the of the entire basin.The extracted oases were divided into 17 watershed-based areas by applying Distance Analysis in ArcGIS package.The relationship between the runoff and the oasis area within a watershed-based area was assessed and a significant correlation was found between the magnitude of runoff and the area of oasis.