基于遥感技术的中国北方沙漠及沙质荒漠化土地区划研究

Zonation of desert and sandy desertification land in North China based on remote sensing technology

根据影响沙漠、沙质荒漠化土地的地质地貌、植被、气候和人类活动等特征,通过确定地域分异、发生学、多级序列等区划原则,建立了以地质地貌类型组合、气候为沙漠、沙质荒漠化土地区(Ⅰ级区)划分和以沙质荒漠化土地类型空间分布特征为沙漠、沙质荒漠化土地亚区(Ⅱ级区)划分的指标体系。采用遥感方法,将中国北方沙漠、沙质荒漠化土地划分为贺兰山以西干旱沙漠、沙质荒漠化区;贺兰山-大兴安岭干旱、半干旱沙漠、沙质荒漠化区和大兴安岭以东半干旱、半湿润沙质荒漠化区等3个区和17个亚区。并对沙漠、沙质荒漠化土地区进行了现状分析。

according to the feature of geologic physiognomy, vegetation and human activities affecting on desert and sandy desertification, by establishing the zoning principle such as zone difference, developing rule and multilevel list, we developed the zoning system for principal zone based on geologic physiognomy and climate, and secondary zone based on spatial distribution feature. Using remote sensing technology, we zoned the desert and sandy desertification land in North China into drouthy desert and sandy desertification zones in the west of Helan mountain; Helan mountain-Daxinganling drouthy and semiarid desert, sandy desertification zone ;semiarid and half wetness sandy desertification in the east of Daxinganling mountain . We did the actuality analysis of desert and sandy desertification land. The result showed that： the area was comparatively small and the intension was biggish in drouthy desert and sandy desertification zones in the west of Helan anling desert, sandy desertification mountain; both of the area and intension were biggish in Helan mountain-Daxinganling drouthy and semiarid desertification zone; the intension was less and the area was biggish in semiarid and half wetness sandy in the east of Daxinganling mountain