Groundwater recharge in Titas Upazila in Bangladesh

Kanoua, Wael; Merkel, Broder J.

doi:10.1007/s12517-014-1305-2

Cited by 10 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The topography of the study area (Titas) is more or less flat (0-25 m above sea level), and comprises irregularly shaped artificial "islands," on which houses are built above the monsoon flooding level, surrounded by low lying areas which are mostly cultivated lands and water bodies (Kanoua and Merkel, 2015). These topographical features are normal and also found in other parts of Bangladesh (Harvey et al, 2006;Khan et al, 2011).…”

Section: Study Areamentioning

confidence: 99%

Modification of a digital elevation model (DEM) in a flat topographic area with respect to manmade features

Kanoua

Merkel

2015

Geosci J

Self Cite

View full text Add to dashboard Cite

This study compares two Digital Elevation Models (DEMs) that are available free of charge: (1) the Consultative Group for International Agriculture Research Consortium for Spatial Information SRTM C-band CGIAR-CSI v4.1 (SRTM): 3 arc sec (approximately 92 m at the equator; originally 1 arc sec but only distributed with 3 arc sec) and (2) the Advanced Spaceborne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model ASTER GDEM v2 (ASTER2): 1 arc sec (approximately 31 m at the equator). Additionally, the DEM was modified according to known topographic features in the study area. The first step was investigating whether there is a spatial shift between the different DEMs by using a very high resolution (VHR) satellite GeoEye image. Beside visual comparisons, statistical methods were applied to compare the elevation models. Reference data used in this study are the Ground Control Points (GCPs) collected in a previous investigation in the same study area. SRTM proved to be the better of two available free elevation models (SRTM and ASTER2). This conclusion is based on an assessment of the different investigated aspects such as morphologic details, reliability, completeness, and accuracy. The ability to modify the SRTM model with 92 m horizontal resolution from the Shuttle Radar Topography Mission is here discussed. The study area is located in Titas Upazila, Comilla district, Bangladesh and comprises manmade topographic features (e.g., road embankments and mounds that houses are built on above the monsoon flooding level), which are not or not completely represented in the DEM due to their small spatial extent. To represent these topographic features, the DEM was refined by dividing each pixel into 0.5 m pixel spacings. The elevated areas (roads and villages) were digitized using GeoEye satellite imagery and Google Earth. The pixels located in the elevated areas were given the proper elevation and rejoined to the original DEM raster. The effect of trees can be excluded because of their scarcity in the studied area, and because their existence is limited just to both sides of the artificially elevated streets and areas where people live. Furthermore, the bias in the SRTM model is eliminated by two steps: (1) the mean (value) of the differences between the GCPs and the corresponding points of the SRTM is subtracted from SRTM points, and then the root mean square error (RMSE) is diminished to 0.67 m; (2) the same mean (value) of the differences is subtracted from the whole SRTM model. The finally modified DEM represents the real terrain surface with the most important details of the study area. This modified elevation model may be used in studies to model groundwater flow driven by topography.

show abstract

Section: Study Areamentioning

confidence: 99%

Modification of a digital elevation model (DEM) in a flat topographic area with respect to manmade features

Kanoua

Merkel

2015

Geosci J

Self Cite

View full text Add to dashboard Cite

show abstract

“…The soil-water balance concept proposed by Thornthwaite and Mather (1955) is one of the most widely used methods for estimating the WBCs. This method is suitable for assessing the effectiveness of agricultural water resource management practices and regional water bal- ance studies because it allows the actual evapotranspiration (A ET ), water deficit, and water surplus to be estimated (Chapman and Brown, 1966;Bakundukize et al, 2011;Karim et al, 2012;Viaroli et al, 2017). The actual evapotranspiration (A ET ) is the amount of water removed from the surface due to evaporation and transpiration.…”

Section: Calculation Of the Potential Evapotranspiration And Water Bamentioning

confidence: 99%

“…The water balance model is considerably important for water resource management, irrigation scheduling, and crop pattern designing (Kang et al, 2003;Valipour, 2012). The model can also be used for the reconstruction of catchment hydrology, climate change impact assessment, and streamflow forecasting (Alley, 1985;Arnall, 1992;Xu and Halldin, 1996;Molden and Sakthivadivel, 1999;Boughton, 2004;Anderson et al, 2006;Healy et al, 2007;Moriarty et al, 2007;Karimi et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Studies have been conducted on the spatiotemporal characteristics of hydrometeorological variables, such as rainfall (Shahid and Khairulmaini, 2009;Ahasan et al, 2010;Kamruzzaman et al, 2016a;Rahman and Lateh, 2016;Syed and Al Amin, 2016), temperature (Shahid, 2010;Nasher and Uddin, 2013;Rahman, 2016;Syed and Al Amin, 2016;Kamruzzaman et al, 2016a), and P ET Acharjee, 2017), in Bangladesh. Karim et al (2012) studied the WBCs, such as the P ET , A ET , deficit of water, and surplus of water, of 12 districts in Bangladesh. Kanoua and Merkel (2015) studied the water balance of Titas Upazila (subdistrict) in Bangladesh.…”

mentioning

confidence: 99%

“…Karim et al (2012) studied the WBCs, such as the P ET , A ET , deficit of water, and surplus of water, of 12 districts in Bangladesh. Kanoua and Merkel (2015) studied the water balance of Titas Upazila (subdistrict) in Bangladesh.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Reply to interactive comments of Referee #2

Anonymous

2018

Preprint

View full text Add to dashboard Cite

Opportunities and challenges for implementing managed aquifer recharge models in drought-prone Barind tract, Bangladesh

2021

View full text Add to dashboard Cite

This study focuses on the Barind tract, a drought prone area situated in the north-west region of Bangladesh where inadequate rainfall and limited surface water have created high dependence on groundwater for irrigation and other purposes, leading to significant declines in groundwater level. Managed aquifer recharge (MAR) offers a potential solution to restore groundwater levels. This study sets out to identify the opportunities and challenges for implementing MAR in the Barind tract. To accomplish this aim, different data sets including bore log lithology, rainfall, groundwater levels, information about re-excavated ponds, dighis, kharies, beels, check dams, rubber dams, dug wells and other necessary information were collected from the Barind Multipurpose Development Authority (BMDA) and other sources and analyzed. Major opportunities for MAR are identified for about 2000 km of re-excavated kharies (canals) containing about 750 check dams, more than 3000 re-excavated ponds, a number of beels (comparatively large marshes) and other water bodies which are used to conserve runoff storm water for supplementary irrigation. The conserved water can be used for groundwater recharge and subsequently abstracted for irrigation. Furthermore, roof-top rain water from buildings can also be used for groundwater recharge purposes. In contrast, the major challenges include the high turbidity of storm water runoff leading to clogging of MAR structures, inadequacy of conventional direct surface methods of recharge due to the presence of a 15 m or more thick upper clay layer with limited percolation capacity, and lack of practical knowledge on MAR. Therefore, overcoming the challenges for MAR application is a prerequisite to maximize the opportunities from MAR that can support the sustainable use of groundwater resources.

show abstract

Groundwater recharge in Titas Upazila in Bangladesh

Cited by 10 publications

References 36 publications

Modification of a digital elevation model (DEM) in a flat topographic area with respect to manmade features

Modification of a digital elevation model (DEM) in a flat topographic area with respect to manmade features

Reply to interactive comments of Referee #2

Opportunities and challenges for implementing managed aquifer recharge models in drought-prone Barind tract, Bangladesh

Contact Info

Product

Resources

About