降雨矢量化对评估干旱时空演变规律的探讨  

Evaluation of Spatiotemporal Evolution of Drought by Rainfall Vectorization

作　　者：延玮辰 姜熙 YAN Wei-chen;and JIANG Xi(Liaoning Jianghe Water Conservancy and Hydropower New Technology Design and Research Institute Co.,Ltd.,Shenyang 110003,China)

机构地区：[1]辽宁江河水利水电新技术设计研究院有限公司,沈阳110003

出　　处：《黑龙江水利科技》2021年第6期53-56,共4页Heilongjiang Hydraulic Science and Technology

摘　　要：为了研究降雨和ET的时间变化特征和空间演变规律,文章以吉林省西部为例,由多年降雨数据,通过降雨集中度和集中期分析,得出结论:吉林平原区自西北向东南降雨集中度呈减少趋势,变化不是很剧烈。自南到北除白城外,生长季最大降雨时间从6月中旬越来越往后推延,该地区防汛抗旱的重点分布在6月中下旬—7月上旬。在白城等8个站点集中度都呈现下降趋势,表明降雨在生长季之内越来越分散;双辽呈现上升趋势,说明双辽站点降雨在生长季之内越来越集中。白城等10个站点集中期都是上升趋势,表明降雨的集中期有往后移动的趋势。此研究可以对吉林省西部地区农田灌溉和防洪防涝起到指导作用。In order to study the temporal and spatial evolution characteristics of rainfall and ET,taking the western part of Jilin Province as an example,using precipitation concentration degree and concentration period,the following conclusions are drawn:the precipitation concentration degree in Jilin plain area was decreasing from northwest to Southeast,but the change was not very dramatic.From the south to the north,except Baicheng,the maximum precipitation time in the growing season was more and more delayed in the middle of June.Therefore,the focus of flood control and drought relief in this area was from late June to early July.In Baicheng and other 8 stations,the station concentration degree was decreasing,indicating that the precipitation of these stations was more and more scattered in the growing season;Shuangliao was in an upward trend,indicating that the precipitation of Shuangliao stations was more and more concentrated in the growing season.In Baicheng and other 10 stations,the concentration period was increasing,indicating that the precipitation concentration period of these stations had a trend of moving back.This study can play a guiding role in farmland irrigation and flood control in the western region of Jilin Province.

关 键 词：矢量化 集中度 集中期 降雨 灌溉 

分 类 号：TV125[水利工程—水文学及水资源]