Simulation of Hydrologic Processes through Calibration of SWAT Model with MODIS Evapotranspiration Data for an Ungauged Basin in Western Himalaya, India

2018 ◽  
pp. 223-241
Author(s):  
Pratik Dash
Keyword(s):  
Swat Model ◽  
Western Himalaya ◽  
Hydrologic Processes ◽  
Ungauged Basin

scholarly journals Hydrological Modeling and Runoff Mitigation in an Ungauged Basin of Central Vietnam Using SWAT Model

Hydrology ◽  
2017 ◽  
Vol 4 (1) ◽  
pp. 16 ◽  
Author(s):  
Ammar Rafiei Emam ◽  
Martin Kappas ◽  
Nguyen Linh ◽  
Tsolmon Renchin
Keyword(s):  
Hydrological Modeling ◽  
Swat Model ◽  
Ungauged Basin ◽  
Central Vietnam

scholarly journals Modeling hydrologic processes and potential responses to climate change in an agro-silvo-pastoral watershed in the Mediterranean area

2020 ◽  
Vol 383 ◽  
pp. 151-158
Author(s):  
Youssef Brouziyne ◽  
Lahcen Benaabidate ◽  
Aziz Abouabdillah ◽  
Rachid Bouabid ◽  
Abdelghani Chehbouni
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
Water Balance ◽  
Assessment Tool ◽  
Flow Direction ◽  
Swat Model ◽  
Water Yield ◽  
Climate Change Scenarios ◽  
Climate Conditions ◽  
Hydrologic Processes

Abstract. Precipitation changes and water use patterns are two factors affecting the water quantity; obviously, hydrologic processes are always linked to many elements in the watershed scale, so to understand water management issues it is fundamental to analyze the different elements of hydrologic processes occurring in the watershed. In this study, the “SWAT” model (Soil and Water Assessment Tool) has been used to simulate the water balance for the present climate conditions on a semi arid watershed located in the central North of Morocco (R'dom). The study watershed covers an area of 1993 km2, and is hosting farming, pasture and forestry related activities. The water stress situation in the R'dom watershed can be summarized as limited resource facing increasing water demand. SWAT model was first run and calibrated under current climate; and was driven with downscaled climate simulations to generate future hydrological projections for R'dom watershed in the 2031 to 2050 horizon under two Representative Concentration Pathways (RCPs): 4.5 and 8.5. The results of the study showed that the water balance in R'dom watershed is dominated by evapotranspiration and the water resources distribution within the watershed is uneven and follows a decreasing gradient matching the flow direction. The main results of climate change scenarios showed that R'dom watershed will undergo significant decrease of water resources availability with more economic impact under the scenario RCP8.5 as all areas hosting the economical activities will be affected and the highest changes of water yield should be under this scenario.

scholarly journals Impact of Land Cover/Use Dynamics on Watershed Flow in Snoqualmie Watershed, King County, WA

2021 ◽  
Vol 258 ◽  
pp. 03019
Author(s):  
Sardorbek Musayev ◽  
Ilhomjon Musaev ◽  
Mashkhurakhon Nuretdinova
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Natural Resources ◽  
Swat Model ◽  
Washington State ◽  
Weather Data ◽  
King County ◽  
Water Shortages ◽  
Hydrologic Processes ◽  
The Us

Water is one of the most important natural resources flow though watersheds. It is expected that within next decade at least 36 states in the US experience water shortages. Preserving and proper management of water and watershed resources is crucial. The objective of this study is to develop SWAT model along with compatible hydrologic programs and calibrate the model to predict the volume and discharge of flow in watershed outlets. Model uses 5 distinct years of land use/cover and weather data to analyse the change in hydrologic processes within thze watershed of Snoqualmie watershed of King county in Washington state. Model shows significant improved predictions for the selected period of time but some certain assumptions suggest the model needs further improvements. Results indicate that land use change and use dynamics have an impact to the watershed flow in Snoqualmie watershed. Results of this study can be used by implementing agencies to manage water and watershed resources in the King county, WA area.

Focus on Thermokarst Lakes in Indian Himalaya: Inception and Implication under Warming Climate

2020 ◽  
Vol 6 (2) ◽  
pp. 59-69
Author(s):  
Pratima Pandey ◽  
S. Nawaz Ali ◽  
Vikram Sharma ◽  
Prashant K. Champati Ray
Keyword(s):  
Western Himalaya ◽  
High Mountain ◽  
Thermokarst Lakes ◽  
Glacial Environments ◽  
Global Warming Scenario ◽  
Scientific Attention ◽  
Topographic Depressions ◽  
Permafrost Thawing ◽  
The Impact ◽  
Thaw Lakes

Thermokarst (Thaw) lakes are landforms found in topographic depressions created by thawing ground ice in permafrost zones. They play an important role in the regulation of climatic functions. These lakes are a manifestation of warming surface temperatures that accelerates the ice-rich permafrost to degrade by creating marshy hollows/ponds. In the current global warming scenario, the thermokarst lakes in the high mountain regions (Himalaya) are expected to grow further. This accelerate permafrost thawing which will affect the carbon cycle, hydrology and local ecosystems. This phenomenon has attracted huge scientific attention because it has led to a rapid mass change of glaciers in the region, including extensive changes occurring on peri-glacial environments. The most striking fact is the release of an enormous amount of greenhouse gases, including methane, carbon dioxide and nitrous oxide that is locked in these lakes. The present study delves into the thermokarst lakes in the upper reaches of Chandra Valley and Western Himalaya. The study also aims at designating the impact of their changes on the ecosystem, particularly their influence on the atmospheric greenhouse gas concentrations.

The Influence of Geographical Factors on Extreme Rainfalls in Lampung Province

2019 ◽  
Vol 1 (1) ◽  
pp. 33
Author(s):  
M Welly
Keyword(s):  
Geographical Location ◽  
Daily Rainfall ◽  
Extreme Rainfall ◽  
Design Flood ◽  
Extreme Rainfall Events ◽  
Rainfall Events ◽  
Ungauged Basin ◽  
Flood Discharge ◽  
Design Rainfall ◽  
Geographical Factors

Many people in Indonesia calculate design rainfall before calculating the design flooddischarge. The design rainfall with a certain return period will eventually be convertedinto a design flood discharge by combining it with the characteristics of the watershed.However, the lack of a network of rainfall recording stations makes many areas that arenot hydrologically measured (ungauged basin), so it is quite difficult to know thecharacteristics of rain in the area concerned. This study aims to analyze thecharacteristics of design rainfall in Lampung Province. The focus of the analysis is toinvestigate whether geographical factors influence the design rainfall that occurs in theparticular area. The data used in this study is daily rainfall data from 15 rainfallrecording stations spread in Lampung Province. The method of frequency analysis usedin this study is the Gumbel method. The research shows that the geographical location ofan area does not have significant effect on extreme rainfall events. The effect of risingearth temperatures due to natural exploitation by humans tends to be stronger as a causeof extreme events such as extreme rainfall.Keywords: Influence, geographical, factors, extreme, rainfall.

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