Open AccessAPPLICATION GIS AND REMOTE SENSINGTO ESTABLISH FLASH FLOOD HAZARD MAP IN TUYEN QUANG PROVINCE
Author(s) -
Văn Trần Đức
Publication year - 2021
Publication title -
khoa học
Language(s) - English
Resource type - Journals
ISSN - 2354-1431
DOI - 10.51453/2354-1431/2021/517
Subject(s) - flash flood , hazard , geography , flood myth , physical geography , hydrology (agriculture) , remote sensing , forestry , cartography , geology , archaeology , ecology , geotechnical engineering , biology
Tuyen Quang is one of the provinces at high risk of flash floods in the Northern Midlands and Mountains of Vietnam. In the rainy season, like other localities in the region, Tuyen Quang has a long, concentrated rainfall combined with steep hills and mountains, large divisions, many rivers, and streams; In addition, the thinning of the vegetation cover due to excessive exploitation of the forest by the local people causes flash floods to appear more and more. Applying GIS and remote sensing to establish a map of flash flood risk is a quantitative approach and high reliability. This article has established a flash flood hazard map at a scale of 1/100,000 in Tuyen Quang province. In the map database, districts with a high risk of flash flood were identified, including Na Hang, Chiem Hoa, Ham Yen, and Lam Binh, the average flash flood hazard level included districts: Yen Son, Son Duong; Tuyen Quang city has a low risk of flash floods.