Managing shallow aquifers in the dry zone of Sri Lanka
This study looks at the groundwater issues in the dry zone of Sri Lanka and shows how the use of remote sensing with high-resolution images can help in groundwater management. A new approach is developed for automatic extraction of the location of agrowells using high-spatial-resolution satellite imageries. As an example, three pilot sites in three different aquifer systems in the country are considered, and their highresolution images are analyzed over two temporal time periods. The analysis suggests that the well density in all three regions has increased over the last few years, indicating higher levels of groundwater extraction. Using the well inventory developed by this new approach, the water budgeting was prepared for the mainland of Jaffna Peninsula. The analysis shows a wide variation in well density in the Jaffna Peninsula, ranging from (as little as) less than 15 wells per square kilometer to (as high as) more than 200 wells per square kilometer. Calculations made for the maximum allowable water extraction in each administrative division of Jaffna show that less than 3 h of daily extraction per well is possible in some districts. This points to an increasing pressure on groundwater resources in the region and thus highlights the importance of understanding groundwater budgets for sustainable development of the aquifers.
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Format: | Journal Article biblioteca |
Language: | English |
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Springer
2015-07
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Subjects: | groundwater recharge, groundwater, water balance, water resources, aquifers, arid zones, remote sensing, density, wells, rain, |
Online Access: | https://hdl.handle.net/10568/78187 https://doi.org/10.1007/s10661-015-4584-5 |
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dig-cgspace-10568-781872023-12-08T19:36:04Z Managing shallow aquifers in the dry zone of Sri Lanka Sood, Aditya Manthrithilake, Herath Siddiqui, Salman Rajah, Ameer Pathmarajah, S. groundwater recharge groundwater water balance water resources aquifers arid zones remote sensing density wells rain This study looks at the groundwater issues in the dry zone of Sri Lanka and shows how the use of remote sensing with high-resolution images can help in groundwater management. A new approach is developed for automatic extraction of the location of agrowells using high-spatial-resolution satellite imageries. As an example, three pilot sites in three different aquifer systems in the country are considered, and their highresolution images are analyzed over two temporal time periods. The analysis suggests that the well density in all three regions has increased over the last few years, indicating higher levels of groundwater extraction. Using the well inventory developed by this new approach, the water budgeting was prepared for the mainland of Jaffna Peninsula. The analysis shows a wide variation in well density in the Jaffna Peninsula, ranging from (as little as) less than 15 wells per square kilometer to (as high as) more than 200 wells per square kilometer. Calculations made for the maximum allowable water extraction in each administrative division of Jaffna show that less than 3 h of daily extraction per well is possible in some districts. This points to an increasing pressure on groundwater resources in the region and thus highlights the importance of understanding groundwater budgets for sustainable development of the aquifers. 2015-07 2016-12-07T04:21:56Z 2016-12-07T04:21:56Z Journal Article Sood, Aditya; Manthrithilake, Herath; Siddiqui, Salman; Rajah, Ameer; Pathmarajah, S. 2015. Managing shallow aquifers in the dry zone of Sri Lanka. Environmental Monitoring and Assessment, 187(7):1-16. doi: 10.1007/s10661-015-4584-5 0167-6369 1573-2959 https://hdl.handle.net/10568/78187 https://doi.org/10.1007/s10661-015-4584-5 en Copyrighted; all rights reserved Open Access 1-16 Springer Environmental Monitoring and Assessment |
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groundwater recharge groundwater water balance water resources aquifers arid zones remote sensing density wells rain groundwater recharge groundwater water balance water resources aquifers arid zones remote sensing density wells rain |
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groundwater recharge groundwater water balance water resources aquifers arid zones remote sensing density wells rain groundwater recharge groundwater water balance water resources aquifers arid zones remote sensing density wells rain Sood, Aditya Manthrithilake, Herath Siddiqui, Salman Rajah, Ameer Pathmarajah, S. Managing shallow aquifers in the dry zone of Sri Lanka |
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This study looks at the groundwater issues in the dry zone of Sri Lanka and shows how the use of remote sensing with high-resolution images can help in groundwater management. A new approach is developed for automatic extraction of the location of agrowells using high-spatial-resolution satellite imageries. As an example, three pilot sites in three different aquifer systems in the country are considered, and their highresolution images are analyzed over two temporal time periods. The analysis suggests that the well density in all three regions has increased over the last few years, indicating higher levels of groundwater extraction. Using the well inventory developed by this new approach, the water budgeting was prepared for the mainland of Jaffna Peninsula. The analysis shows a wide variation in well density in the Jaffna Peninsula, ranging from (as little as) less than 15 wells per square kilometer to (as high as) more than 200 wells per square kilometer. Calculations made for the maximum allowable water extraction in each administrative division of Jaffna show that less than 3 h of daily extraction per well is possible in some districts. This points to an increasing pressure on groundwater resources in the region and thus highlights the importance of understanding groundwater budgets for sustainable development of the aquifers. |
format |
Journal Article |
topic_facet |
groundwater recharge groundwater water balance water resources aquifers arid zones remote sensing density wells rain |
author |
Sood, Aditya Manthrithilake, Herath Siddiqui, Salman Rajah, Ameer Pathmarajah, S. |
author_facet |
Sood, Aditya Manthrithilake, Herath Siddiqui, Salman Rajah, Ameer Pathmarajah, S. |
author_sort |
Sood, Aditya |
title |
Managing shallow aquifers in the dry zone of Sri Lanka |
title_short |
Managing shallow aquifers in the dry zone of Sri Lanka |
title_full |
Managing shallow aquifers in the dry zone of Sri Lanka |
title_fullStr |
Managing shallow aquifers in the dry zone of Sri Lanka |
title_full_unstemmed |
Managing shallow aquifers in the dry zone of Sri Lanka |
title_sort |
managing shallow aquifers in the dry zone of sri lanka |
publisher |
Springer |
publishDate |
2015-07 |
url |
https://hdl.handle.net/10568/78187 https://doi.org/10.1007/s10661-015-4584-5 |
work_keys_str_mv |
AT soodaditya managingshallowaquifersinthedryzoneofsrilanka AT manthrithilakeherath managingshallowaquifersinthedryzoneofsrilanka AT siddiquisalman managingshallowaquifersinthedryzoneofsrilanka AT rajahameer managingshallowaquifersinthedryzoneofsrilanka AT pathmarajahs managingshallowaquifersinthedryzoneofsrilanka |
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1787230396507750400 |