Building and Application of Vegetation Growth State Evaluation Model in the Yellow River Basin Based on MODIS Data in Time Series
It is the most important to evaluate changes of environment according to vegetation growth state. In this paper, vegetation growth rules in various underlying surface are analyzed, and the relation between standard deviation and mean value based in feature space is also studied. We select various kinds of vegetation in various positions of the Yellow River Basin. The pixels position of various vegetations in the feature space indicates that the related coefficients between standard and mean value be high, but the differences could be obvious with differences of various kinds. According to above analysis, set up VGSEM model (VGSEM=2×90×arctan ( S/P) (S-standard deviation, P-mean value)), and then put into application in the Yellow River basin to evaluate vegetation growth state according to real condition of various subzone areas. The research result shows that the vegetation growth condition in the areas above Lanzhou and riverside regions is good, but there exists some deviation due to the difference between vegetation types, so the difference of cropland, leaf-fall and evergreen vegetation should be considered in the actual application.
Model of evaluation NDVI data in time series the Yellow River Basin vegetation growth state
Wang Shudong Yang Shengtian
State Key Laboratory of Remote Sensing Science, Beijing Key Laboratory for Remote Sensing of Environ State Key Laboratory of Remote Sensing Science, Beijing Key Laboratory for Remote Sensing of Environ
国际会议
郑州
英文
787-791
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）