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Small Reservoirs, Landscape Changes and Water Quality in Sub-Saharan West Africa
Water (Basel), 2020-07, Vol.12 (7), p.1967
[Peer Reviewed Journal]
COPYRIGHT 2020 MDPI AG ;Attribution ;ISSN: 2073-4441 ;EISSN: 2073-4441 ;DOI: 10.3390/w12071967
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Title:
Small Reservoirs, Landscape Changes and Water Quality in Sub-Saharan West Africa
Author:
Cecchi, Philippe
;
Forkuor, Gerald
;
Cofie, Olufunke
;
Lalanne, Franck
;
Poussin, Jean-Christophe
;
Jamin, Jean-Yves
Subjects:
anthropogenic pressures
;
Earth Sciences
;
Environmental aspects
;
Hydrology
;
Landscape evolution
;
Reservoirs
;
Sciences of the Universe
;
small reservoirs
;
sub-Saharan Africa
;
Water quality
Is Part Of:
Water (Basel), 2020-07, Vol.12 (7), p.1967
Description:
Small reservoirs (SRs) are essential water storage infrastructures for rural populations of Sub-Saharan West Africa. In recent years, rapid population increase has resulted in unprecedented land use and land cover (LULC) changes. Our study documents the impacts of such changes on the water quality of SRs in Burkina Faso. Multi-temporal Landsat images were analyzed to determine LULC evolutions at various scales between 2002 and 2014. Population densities were calculated from downloaded 2014 population data. In situ water samples collected in 2004/5 and 2014 from selected SRs were analyzed for Suspended Particulate Matter (SPM) loads, an integrative proxy for water quality. The expansion of crop and artificial areas at the expense of natural covers controlled LULC changes over the period. We found a very significant correlation between SPM loads and population densities calculated at a watershed scale. A general increase between the two sampling dates in the inorganic component of SPM loads, concomitant with a clear expansion of cropland areas at a local scale, was evidenced. Results of the study suggest that two complementary but independent indicators (i.e., LULC changes within 5-km buffer areas around SRs and demographic changes at watershed scale), relevantly reflected the nature and intensity of overall pressures exerted by humans on their environment, and locally on aquatic ecosystems. Recommendations related to the re-greening of peripheral areas around SRs in order to protect water bodies are suggested.
Publisher:
MDPI AG
Language:
English
Identifier:
ISSN: 2073-4441
EISSN: 2073-4441
DOI: 10.3390/w12071967
Source:
Hyper Article en Ligne (HAL) (Open Access)
GFMER Free Medical Journals
ROAD: Directory of Open Access Scholarly Resources
ProQuest Central
DOAJ Directory of Open Access Journals
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