基于TVDI的内蒙古草地干旱变化特征分析

程伟,辛晓平

Analysis of Spatial-Temporal Characteristics of Drought Variation in Grassland Area of Inner Mongolia Based on TVDI

CHENG Wei,XIN XiaoPing

表3 各草地类型TVDI的一元线性回归特征及干旱变化趋势

Table 3 Characteristic of linear regression of TVDI and drought trend in different grassland types

草地类型 Grassland type 回归方程 Regression equation R2 显著性 Significance TVDI趋势 Trend of TVDI 干旱趋势 Trend of drought TMS y = -0.0036x + 0.5725 0.4428 P<0.01 减小 Decrease 变湿 Wet TDS y = 0.0026x + 0.6297 0.279 P<0.05 增加 Increase 变干 Dry TSD y = 0.003x + 0.6846 0.4666 P<0.01 增加 Increase 变干 Dry TD y = 0.0025x + 0.7812 0.4091 P<0.01 增加 Increase 变干 Dry LM y = -0.0018x + 0.526 0.3518 P<0.01 减小 Decrease 变湿 Wet MM y = -0.0036x + 0.4641 0.4956 P<0.01 减小 Decrease 变湿 Wet M y = -0.0015x + 0.6542 0.307 P<0.05 减小 Decrease 变湿 Wet