Analysis of the Characteristics of Changes in Dryland Area in Yonghe County from 2008 to 2020
To explore the dynamic characteristics of various land-use types in the dry flat ground of Yonghe County over the years,this paper compares and analyzes the dynamic characteristics and land use dynamic attitude of various land-use types in the dry flat ground based on four periods of land use data from 2008,2012,2016,and 2020.The results showed that:(1)From 2008 to 2020,the horizontal terraces were the main land-use types in the study area,accounting for 48.90％to 72.93％;The proportion of dam land and dryland was second,accounting for 17.62％～28.86％and 7.66％～20.17％respectively;The floodplain was the least,accounting for 1.72％～2.07％.(2)The absolute change in the area of various types of dry flat ground from 2008 to 2020 was:horizontal terraces＞dam land＞floodplain＞dryland.The area of horizontal terraces showed an increasing trend,while the area of dam land showed a decreasing trend.The area of dam land and floodplain first increased and then remained unchanged.The area of dryland on the beach first decreased and then remained unchanged.(3)The land use dynamic attitude of dry flat ground area from 2008 to 2020,the dynamic degree of horizontal terraces was the highest,reaching 22.34％;The dynamic degree of floodplain and dam land were in the middle;The dynamic attitude of dryland was the smallest,only-0.52％.The dynamic changes of various types of land area in dry flat ground during different research periods vary,among which dynamic attitude of horizontal horizontal terraces was the highest from 2008 to 2012,reaching 25.61％.(4)In the future,the management of arid flat land should pay more attention to improving soil fertility,optimizing water-saving irrigation technology,and improving farming system,in order to promote high-quality development of land resources and comprehensive rural revitalization.
Dry flat groundHorizontal terracesLand use dynamic attitude
NETL
NSTL
万方数据
