2003~2022年甘德地区土壤湿度变化与干旱评价  

SOIL MOISTURE CHANGE AND DROUGHT EVALUATION IN GANDE AREA FROM 2003 TO 2022

作　　者：许婷 周措毛 鲍积热吉 张静 XU Ting(Gande County Meteorological Bureau,Gande Qinghai 814199,China)

机构地区：[1]甘德县气象局,青海甘德814199 [2]果洛州气象台,青海大武814099 [3]青海省气象服务中心,青海西宁810001

出　　处：《青海草业》2024年第1期75-79,共5页Qinghai Prataculture

基　　金：第二次青藏高原综合科学考察研究一生物地球化学循环与环境健康专题人类活动与生存环境安全(20190ZKK0606)资助。

摘　　要：基于果洛州甘德地区近20 a的土壤湿度观测数据,分析了0~30 cm土壤湿度的趋势变化特征、旱情特征及其与气温、降水、日照、风速等气候因子的关系,结果表明:(1)土壤相对湿度的年际变化以波动增加为主,变化速率为0.73%/a;(2)土壤水分呈现周期性变化,旱情主要集中在2004~2013年,且4~6月旱情出现较少,8月最多,中旱和重旱也主要集中在8月;(3)各季节土壤湿度与降水量均呈明显的正相关。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.

关 键 词：土壤相对湿度 干旱 变化速率 

分 类 号：S152.71[农业科学—土壤学]