文献类型：期刊文献

中文题名：基于标准化土壤湿度指数的贵州省农业干旱评价

英文题名：Evaluation of Agricultural Drought in Guizhou Province Based on Standardized Soil Moisture Index

作者：刘振男 焦卫国 王笑宇 徐桂弘 吴安杰

第一作者：刘振男

机构：[1]贵州理工学院土木工程学院,贵州贵阳550001;[2]安徽农业大学工学院,安徽合肥230036

第一机构：贵州理工学院土木工程学院

年份：2022

期号：11

起止页码：1-5

中文期刊名：中国农村水利水电

外文期刊名：China Rural Water and Hydropower

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家自然科学基金项目(52069005,62163008);贵州省科技计划项目(黔科合基础-ZK[2021]一般295,黔科合基础[2020]1Y248);贵州理工学院高层次人才科研启动项目(XJGC20210425)。

语种：中文

中文关键词：标准化土壤湿度指数;土壤含水量;农业干旱;贵州省

外文关键词：standardized soil moisture index;soil moisture content;agricultural drought;Guizhou Province

摘要：在全球气候变化与人类活动影响不断加剧的背景下,干旱已成为制约我国社会经济可持续发展的关键因素,严重威胁了国家粮食安全、用水安全以及生态安全。基于中国气象局全球陆面再分析产品,提取了贵州省月尺度土壤含水量数据,计算了月尺度标准化土壤湿度指数,评价了该指数对农业干旱识别的适用性、对历史典型干旱过程模拟的准确性,分析了干湿长期演变趋势,统计了干旱最可能发生的时间。结果表明:月尺度标准化土壤湿度指数对研究区干旱的表征结果与中国水旱灾害公报的记录情况基本相符,不仅干旱历时描述准确,而且干旱强度判别合理;月尺度标准化土壤湿度指数具备较好的干旱过程监测能力,不仅能准确地模拟干旱发生、发展直至消除的全过程,而且还能实时地反映旱情的时间与空间变化特征,尤其是对重旱以上旱情过程监测方面精度更高;贵州省干湿演变规律特征明显,即自西向东呈现出由湿变干的总格局,其中,变湿地区主要集中在研究区西北部,而东南部等地变干趋势显著;贵州省干旱发生时间主要集中在春冬两季,其中,西北地区多发于1月份,东部及东南地区干旱多发于2月份,中部地区干旱多发于3月份与4月份,西南地区干旱多发于4月份。研究成果可为贵州省农业干旱评价与防旱减灾工作提供参考依据。
Under the background of global climate change and the increasing impact of human activities,drought has become a key factor re?stricting the sustainable development of China’s social economy,seriously threatening the national food security,water security and ecologi?cal security.This paper is based on the global land reanalysis product of China Meteorological Administration.It extracts the monthly soil moisture data of Guizhou province and calculates the standardized soil moisture index.The applicability of the index to agricultural drought identification and the accuracy of historical typical drought process simulation are evaluated.The long-term evolution trend of dry and wet is analyzed,and the most likely time of drought is calculated.The results show that the monthly standardized soil moisture index is consistent with the record of China Flood and drought Disaster bulletin,and the drought duration is accurately described and the drought intensity is reasonable.The monthly standardized soil moisture index can not only accurately simulate the whole process of drought occurrence,develop?ment and elimination,but also reflect the temporal and spatial characteristics of drought in real time,especially for the monitoring of drought processes above severe drought.The dry and wet evolution characteristics of Guizhou Province are obvious,that is,there is a general pattern from wet to dry from west to east.The wet areas are mainly concentrated in the northwest of the study area,while the drying trend is signifi?cant in the southeast and other areas.Drought occurs mainly in spring and winter in Guizhou Province,among which,drought occurs in the northwest in January,in the east and southeast in February,in central region in March and April,and in southwest in April.The results of this study can provide a reference for agricultural drought evaluation and drought prevention and mitigation work in Guizhou Province.