Evaluation of groundwater recharge based on rainfall and land use changes

The soil water assessment tool (SWAT) is a continuous and distributed hydrologic model created to simulate the effect of land management practices on water in the watershed. Understanding relationship of water extraction of groundwater can lead to better watershed management. The main problem in thi...

Full description

Saved in:

Bibliographic Details
Main Author:	Ebrahim, Mohammad Nazri
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Groundwater - Analysis Groundwater recharge Land use - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/98114/1/FK%202021%2027%20IR.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.98114
record_format	uketd_dc
spelling	my-upm-ir.981142022-07-21T07:57:24Z Evaluation of groundwater recharge based on rainfall and land use changes 2020-09 Ebrahim, Mohammad Nazri The soil water assessment tool (SWAT) is a continuous and distributed hydrologic model created to simulate the effect of land management practices on water in the watershed. Understanding relationship of water extraction of groundwater can lead to better watershed management. The main problem in this study is the complexity of recharge processes and limited observations in groundwater recharge in Malaysia makes it difficult to quantify. This study was done at Baung’s watershed (BW) which can be considered as an ungauged watershed. The estimation of groundwater recharge in BW was done using SWAT. A framework for SWAT input data including hydrography, terrain, land-use, soil and weather for BW was then focused in order to achieve the model simulation for ungauged basins. The results emphasize the importance and prospects of using accurate spatial input data for the physically based SWAT model. Normal rainfall condition, extreme-low rainfall condition, normal rainfall under future land use and extreme low rainfall condition under future in land-use development represented as Scenario 1, Scenario 2, Scenario 3 and Scenario 4 were evaluated in this study. These conditions give different groundwater recharge rate as different scenarios give different impact to groundwater. The coefficient of determination, R2 of the model is 0.9676. Model was found to produce a reliable estimation of groundwater recharge of 405 mm/year (14.6%), 194.12mm/year (11.1%), 214.23 mm/year (7.7%) and 95.55 mm/year (5.5%) for Scenario 1, Scenario 2, Scenario 3 and Scenario 4 respectively. In conclusion, it is suggested that groundwater recharge should not be assume with only one specific value such as 6%, 11% and 26% of annual rainfall as the land use development and rainfall intensity factors influencing groundwater recharge need to be took into consideration in assisting groundwater exploration and management. Groundwater - Analysis Groundwater recharge Land use - Case studies 2020-09 Thesis http://psasir.upm.edu.my/id/eprint/98114/ http://psasir.upm.edu.my/id/eprint/98114/1/FK%202021%2027%20IR.pdf text en public masters Universiti Putra Malaysia Groundwater - Analysis Groundwater recharge Land use - Case studies Mohamed Zawawi, Mohamed Azwan
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Mohamed Zawawi, Mohamed Azwan
topic	Groundwater - Analysis Groundwater recharge Land use - Case studies
spellingShingle	Groundwater - Analysis Groundwater recharge Land use - Case studies Ebrahim, Mohammad Nazri Evaluation of groundwater recharge based on rainfall and land use changes
description	The soil water assessment tool (SWAT) is a continuous and distributed hydrologic model created to simulate the effect of land management practices on water in the watershed. Understanding relationship of water extraction of groundwater can lead to better watershed management. The main problem in this study is the complexity of recharge processes and limited observations in groundwater recharge in Malaysia makes it difficult to quantify. This study was done at Baung’s watershed (BW) which can be considered as an ungauged watershed. The estimation of groundwater recharge in BW was done using SWAT. A framework for SWAT input data including hydrography, terrain, land-use, soil and weather for BW was then focused in order to achieve the model simulation for ungauged basins. The results emphasize the importance and prospects of using accurate spatial input data for the physically based SWAT model. Normal rainfall condition, extreme-low rainfall condition, normal rainfall under future land use and extreme low rainfall condition under future in land-use development represented as Scenario 1, Scenario 2, Scenario 3 and Scenario 4 were evaluated in this study. These conditions give different groundwater recharge rate as different scenarios give different impact to groundwater. The coefficient of determination, R2 of the model is 0.9676. Model was found to produce a reliable estimation of groundwater recharge of 405 mm/year (14.6%), 194.12mm/year (11.1%), 214.23 mm/year (7.7%) and 95.55 mm/year (5.5%) for Scenario 1, Scenario 2, Scenario 3 and Scenario 4 respectively. In conclusion, it is suggested that groundwater recharge should not be assume with only one specific value such as 6%, 11% and 26% of annual rainfall as the land use development and rainfall intensity factors influencing groundwater recharge need to be took into consideration in assisting groundwater exploration and management.
format	Thesis
qualification_level	Master's degree
author	Ebrahim, Mohammad Nazri
author_facet	Ebrahim, Mohammad Nazri
author_sort	Ebrahim, Mohammad Nazri
title	Evaluation of groundwater recharge based on rainfall and land use changes
title_short	Evaluation of groundwater recharge based on rainfall and land use changes
title_full	Evaluation of groundwater recharge based on rainfall and land use changes
title_fullStr	Evaluation of groundwater recharge based on rainfall and land use changes
title_full_unstemmed	Evaluation of groundwater recharge based on rainfall and land use changes
title_sort	evaluation of groundwater recharge based on rainfall and land use changes
granting_institution	Universiti Putra Malaysia
publishDate	2020
url	http://psasir.upm.edu.my/id/eprint/98114/1/FK%202021%2027%20IR.pdf
_version_	1747813840361357312

Evaluation of groundwater recharge based on rainfall and land use changes

Similar Items