Ứng dụng công nghệ viễn thám xây dựng, kiểm đếm nguồn nước cho các hồ chứa Việt Nam

Abstract

Vietnam has approximatelys 6695 reservoirs with important roles in the process of regulating and balancing water, contributing to water resource management and disaster monitoring. However, the documents about reservoir characteristic curve are outdated or lack. To solve the above problems, the paper will present the results of research to application of remote sensing technology for define reservoir characteristic curve by methods using radar images: Sentinel-1 combined with optical images: Sentinel-2, Landsat 8 were collected during the period from 2014 to 2019 for typical lakes in the Central region. The results have been verified with actual monitoring data through specific Nash index: the relationship graph Z - F and Z - W of Ha Thuong lake: 0.96 and 0.99; Lanh Ra Lake: 0.94 and 0.97; Song Trau lake: 0.98 and 0.95. The research results have developed a method of assessing water resources through the construction of a reservoir characteristic curve, thereby creating a premise in the counting and monitoring of water sources for medium and large reservoirs for other regions of Vietnam in the future. The method opens the direction of applying remote sensing technology in indirect assessment of flows and shorelines for future studies.