doi:10.16186/j.cnki.1673-9787.2020.5.8

Received:2019/12/27

Revised:2020/03/11

Published:2020/09/15

Study on soil moisture trend of different land types based on TVDI

WANG Hanwen, YUAN Xizhong, LEI Shengyou, GUO Changzhi, CHU Zhicheng, CHEN Hongyu, CHEN Penghui

School of Highway， Chang’an University，Xi’an 710064 ， Shaanxi， China

Abstract:In order to understand the change trend of soil moisture of different land types in parts of Shaoguan city in the north of Guangdong Province，Landsat 8 related data were used to carry out the classification of land type and the monitoring and inversion of the soil moisture in the study area， and the representative temperature vegetation drought index（ TVDI） in each month of the year was obtained. The temporal and spatial distribution characteristics of soil moisture in the study area were described based on TVDI，and combined with the classification of land types，the annual changes of soil moisture in several land types were obtained. The results showed that the west side of the study area was relatively dry and the east side was relatively humid，and during the year，it generally showed a cycle of decreasing to a certain extent，keeping stable for several months，and then rising and keeping stable. Additionally，obvious changing trends of soil moisture of different land types could be found in the study. Specifically，from March to October，the order of soil moisture from high to low was as follows：forest land，grassland，and cultivated land.However，the order from high to low in the rest of the time was as follows：forest land，cultivated land，and grassland. The humidity of cultivated land or grassland was closely related to human factors and climate in the study area.

Key words:temperature vegetation drought index;temporal and spatial distribution of soil moisture;land type;

基于TVDI的不同土地类型土壤湿度趋势研究_王汉文.pdf