摘要
2018年汛期,黄河流域发生多次强降雨过程,干流先后形成3次编号洪水,部分支流出现建站以来最大洪水。综合考虑黄河流域雨情、汛情和天气发展形势,采取了"一高一低"洪水防御水库调度思路,滚动预报,加密会商,精细调度,实现了水库拦洪削峰、排沙减淤、河道安全及洪水资源利用,提出了尽快构建水工程综合调度平台、加强上游洪水预报及完善黄河水沙调控体系等建议,为多沙河流水沙联合调控提供了借鉴。
Taking Landsat series satellite imagery as the main data source,combined with hydrological data,thematic data and other related research literature;twelve images of Liangzi Lake corresponds to periods of high and low water level around 1970,1980,1990,2000,2010 and 2016 are selected to extract the lake boundary using normalized water body index and the modified normalized index and calculate the lake area and flood storage volume.In addition,combined with the impact of human activities in the Liangzi Lake area,the change trend of lake area and flood storage volume is analyzed.The results show that:①the relative errors of the extracted water body area and the calculated storage volume of Liangzi Lake are within 10%;②Within 45 years since 1973,the water surface area and flood storage volume of Liangzi Lake have decreased in the beginning and then increased,which is closely related to the impact of human activities.
作者
魏军
张丙夺
蔡彬
朱信华
WEI Jun;ZHANG Bingduo;CAI Bin(Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010)
出处
《中国防汛抗旱》
2019年第4期10-14,35,共6页
China Flood & Drought Management
关键词
黄河
水库群联合调度
水沙调度
Liangzi Lake
remote sensing
flood storage volume
human activities
