摘要
基于对已有土地沙化概念的分析,结合对沙化现象的认识,将砾化从沙化中剥离出来,并分别定义了沙化和砾化。文章提出较为全面和中立的沙化和砾化定义:沙化是土地表层沙物质比例或量的增加过程;砾化是土地表层砾石的比例或量增加的过程。在此基础上,提出了衡量一个区域土地沙化、砾化的程度与强度的指标,根据沙化的动力和效应对沙化做出逻辑关系清晰的分类与表述。论述了沙化的正、负效应,指出风蚀沙化、砾化和去灌丛化、去沙化都是草原退化的表现,而适度、适地的风积沙化有一定的正面效应。同时,探讨了沙化与沙被、草原退化、荒漠化等的关系。
Based on the analysis of the existing concept of land sandification and the understanding of the phenomenon of it,this paper separates the gravelization from the land sandification,and defines the land sandification and gravelization respectively.The author puts forward a more comprehensive and neutral definition of land sandification and gravelization:land sandification is the process of increasing the proportion or amount of surface sand material,while gravelization is the process of increasing the proportion or amount of surface gravel.On this basis,the index to measure the degree and intensity of land sandification and gravelization in a region is put forward,and the logical relation of land sandification is clearly classified and expressed according to the driving force and effect of land sandification.The positive and negative effects of land sandification are discussed,and it is pointed out that wind erosion,gravel erosion,shrub removal and land sandification are all the manifestations of grassland degradation,while the aeolian desertification of moderately suitable land has a certain positive effect.At the same time,the relationship between land sandification and sand cover,grassland degradation and desertification is discussed.
作者
裴浩
吴昊
关彦如
苗百岭
Pei Hao;Wu Hao;Guan Yanru;Miao Bailing(Inner Mongolia Desert Ecological Meteorological Center,Inner Mongolia Hohhot 010051;Inner Mongolia Meteorological Bureau,Inner Mongolia Hohhot 010051;Inner Mongolia Meteorological Training Center,Inner Mongolia Hohhot 010051;Inner Mongolia Meteorological Institute,Inner Mongolia Hohhot 010051)
出处
《内蒙古气象》
2022年第1期16-23,共8页
Meteorology Journal of Inner Mongolia
关键词
沙化
沙被
砾化
草原退化
去沙化
荒漠化
Land sandification
Sand cover
Gravel
Grassland degradation
Remove thesandy desertification
Desertification
