基于降水利用率的土地退化时空监测分析  

Spatio-temporal Monitoring and Analysis of Land Degradation Based on Precipitation Utilization

作　　者：赵玉玲[1] 刘海新[1] 刘新侠[1] 孙秀云 杨楠楠 ZHAO Yuling;LIU Haixin;LIU Xinxia;SUN Xiuyun;YANG Nannan(School of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学采矿与地理学院,河北邯郸056038

出　　处：《测绘与空间地理信息》2022年第4期1-4,共4页Geomatics & Spatial Information Technology

基　　金：2018年河北省社会科学基金项目(HB18GL024)资助。

摘　　要：土地退化对人类的可持续发展形成严重的威胁,在制定适当的预防措施时对其进行定量评价显得尤为重要。本文以河北省为研究区,基于MODIS-NPP和气象数据,采用多年平均相对降水利用率RUE(rRUE_(me))和年极大相对降水利用率RUE(rRUE_(ex))指标对其土地生产力和土地退化进行了评价。结果表明,研究区土地生产能力极好和较好的土地占整个研究区的96.5%,生产能力较差的土地所占比例为3.5%;研究区土地退化指标中良好和极好的土地占95.63%,其中土地退化状况极好的土地主要分布在保定市、石家庄和衡水市;轻中度退化土地占4.37%,承德市是中度退化土地的主要分布区。It is particularly important to quantitative evaluate land degradation in formulating appropriate preventive measures that land degradation make a serious threat to the sustainable development of human beings.In this paper,Hebei Province is used as the study area.Based on MODIS-NPP data and meteorological data,the land productivity and land degradation in Hebei Province were assessed/evaluated by the indicators of multi-year average relative RUE(rRUE_(me))and annual maximum relative RUE(rRUE_(ex)).The results showed that the land with better and excellent land productivity in study area account for 96.5%of the entire research area,and the proportion of land with poor productive capacity is 3.5%.In the study area,95.63%of the land was well degraded and excellent degraded,and the degradation degree of excellent was mainly distributed in Baoding,Shijiazhuang and Hengshui.The slightly degraded and moderately degraded land is 4.37%of the total area,and the moderately degraded land was mainly distributed in Chengde.

关 键 词：降水利用率 MODIS 土地生产力 土地退化 NPP 

分 类 号：P208[天文地球—地图制图学与地理信息工程]