Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model
Floods not only provide a large amount of water resources, but they also cause serious disasters. Although there have been numerous hydrological studies on flood processes, most of these investigations were based on rainfall-type floods in plain areas. Few studies have examined high temporal resolut...
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doaj-9edcac4e0ffb4b6ea42f72e39fc6592f2020-11-25T01:31:48ZengMDPI AGInternational Journal of Environmental Research and Public Health1660-46012019-08-011617311810.3390/ijerph16173118ijerph16173118Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) ModelYongchao Duan0Fanhao Meng1Tie Liu2Yue Huang3Min Luo4Wei Xing5Philippe De Maeyer6State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaInner Mongolia Normal University, Hohhot 010022, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaInner Mongolia Normal University, Hohhot 010022, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, ChinaDepartment of Geography, Ghent University, Ghent 9000, BelgiumFloods not only provide a large amount of water resources, but they also cause serious disasters. Although there have been numerous hydrological studies on flood processes, most of these investigations were based on rainfall-type floods in plain areas. Few studies have examined high temporal resolution snowmelt floods in high-altitude mountainous areas. The Soil Water Assessment Tool (SWAT) model is a typical semi-distributed, hydrological model widely used in runoff and water quality simulations. The degree-day factor method used in SWAT utilizes only the average daily temperature as the criterion of snow melting and ignores the influence of accumulated temperature. Therefore, the influence of accumulated temperature on snowmelt was added by increasing the discriminating conditions of rain and snow, making that more suitable for the simulation of snowmelt processes in high-altitude mountainous areas. On the basis of the daily scale, the simulation of the flood process was modeled on an hourly scale. This research compared the results before and after the modification and revealed that the peak error decreased by 77% and the time error was reduced from ±11 h to ±1 h. This study provides an important reference for flood simulation and forecasting in mountainous areas.https://www.mdpi.com/1660-4601/16/17/3118sub-dailyflood processesaccumulated temperature (AT)degree-day factorSWAT |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yongchao Duan Fanhao Meng Tie Liu Yue Huang Min Luo Wei Xing Philippe De Maeyer |
spellingShingle |
Yongchao Duan Fanhao Meng Tie Liu Yue Huang Min Luo Wei Xing Philippe De Maeyer Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model International Journal of Environmental Research and Public Health sub-daily flood processes accumulated temperature (AT) degree-day factor SWAT |
author_facet |
Yongchao Duan Fanhao Meng Tie Liu Yue Huang Min Luo Wei Xing Philippe De Maeyer |
author_sort |
Yongchao Duan |
title |
Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model |
title_short |
Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model |
title_full |
Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model |
title_fullStr |
Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model |
title_full_unstemmed |
Sub-Daily Simulation of Mountain Flood Processes Based on the Modified Soil Water Assessment Tool (SWAT) Model |
title_sort |
sub-daily simulation of mountain flood processes based on the modified soil water assessment tool (swat) model |
publisher |
MDPI AG |
series |
International Journal of Environmental Research and Public Health |
issn |
1660-4601 |
publishDate |
2019-08-01 |
description |
Floods not only provide a large amount of water resources, but they also cause serious disasters. Although there have been numerous hydrological studies on flood processes, most of these investigations were based on rainfall-type floods in plain areas. Few studies have examined high temporal resolution snowmelt floods in high-altitude mountainous areas. The Soil Water Assessment Tool (SWAT) model is a typical semi-distributed, hydrological model widely used in runoff and water quality simulations. The degree-day factor method used in SWAT utilizes only the average daily temperature as the criterion of snow melting and ignores the influence of accumulated temperature. Therefore, the influence of accumulated temperature on snowmelt was added by increasing the discriminating conditions of rain and snow, making that more suitable for the simulation of snowmelt processes in high-altitude mountainous areas. On the basis of the daily scale, the simulation of the flood process was modeled on an hourly scale. This research compared the results before and after the modification and revealed that the peak error decreased by 77% and the time error was reduced from ±11 h to ±1 h. This study provides an important reference for flood simulation and forecasting in mountainous areas. |
topic |
sub-daily flood processes accumulated temperature (AT) degree-day factor SWAT |
url |
https://www.mdpi.com/1660-4601/16/17/3118 |
work_keys_str_mv |
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