SOIL MOISTURE CHANGE AND DROUGHT EVALUATION IN GANDE AREA FROM 2003 TO 2022
Based on the observation data of soil moisture in Gande area of Guoluo Prefecture in the past 20 years,the trend change characteristics of soil moisture from 0 to 30 cm,drought characteristics,and their relationship with climatic factors such as temperature,precipitation,sunshine and wind speed were analyzed.The results showed that:(1)The interannual variation of soil relative humidity was mainly increased by fluctuation,with a change rate of 0.73％/a.(2)The soil moisture showed periodic changes,with drought mainly concentrated from 2004 to 2013,and drought appeared less from April to June,most in August,moderate drought and severe drought are also mainly concentrated in August.(3)There was a significant positive correlation between soil moisture and precipitation in each season.
NETL
NSTL
万方数据
