Runoff evolution due to land-use change in a small Sahelian catchment
Land-use changes have been significant these last decades in West Africa, particularly in the Sahel region; in this area, climatic and demographic factors have led to a rise in cropped areas in recent decades causing strong changes in the water cycle and in river regimes. This study compares the rai...
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| Veröffentlicht in: | Hydrological sciences journal 2015-01, Vol.60 (1), p.78-95 |
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| creator | Amogu, O Esteves, M Vandervaere, J-P Malam Abdou, M Panthou, G Rajot, J-L Souley Yéro, K Boubkraoui, S Lapetite, J.-M Dessay, N Zin, I Bachir, A Bouzou Moussa, I Faran Maïga, O Gautier, E Mamadou, I Descroix, L |
| description | Land-use changes have been significant these last decades in West Africa, particularly in the Sahel region; in this area, climatic and demographic factors have led to a rise in cropped areas in recent decades causing strong changes in the water cycle and in river regimes. This study compares the rainfall–runoff relationships for two periods (1991–1994 and 2004–2011) in two small and similar neighbouring Sahelian catchments (approx 0.1 km ² each). This allows identification of the different hydrological consequences of land-use/land-cover change, particularly the fallow shortening and the consequent degradation of topsoil. The main land surface change is a 75% increase in crusted soil area. Runoff increased by more than 20% on average between the two periods while flood duration decreased by 50% on average. However, runoff values remained largely constant in the lower part of the northern basin due to a strong increase in in-channel infiltration. Editor D. Koutsoyiannis; Associate editor T. Wagener |
| doi_str_mv | 10.1080/02626667.2014.885654 |
| format | Article |
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Wagener</description><subject>Catchments</subject><subject>changements d'usage des sols</subject><subject>coefficient d'écoulement</subject><subject>Constants</subject><subject>crusted soils</subject><subject>duration of flow</subject><subject>durée de l'écoulement</subject><subject>Editors</subject><subject>Evolution</subject><subject>Freshwater</subject><subject>hydrologic cycle</subject><subject>Hydrology</subject><subject>Land use</subject><subject>land use change</subject><subject>land-use changes</subject><subject>Neighbouring</subject><subject>rivers</subject><subject>Runoff</subject><subject>runoff coefficient</subject><subject>Sahel</subject><subject>sols encroutés</subject><subject>topsoil</subject><subject>watersheds</subject><issn>2150-3435</issn><issn>0262-6667</issn><issn>2150-3435</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkUtrFjEUhgexYG39B4IBN27m8-Q6yUqk1AsUhF7W4ZhJ-k3JJDWZsfTfm49REDc1i5Msnvc9J-ftutcUdhQ0vAemmFJq2DGgYqe1VFI8644ZldBzweXzv94vupe13gFwYRQ_7s4v15RDIP5njusy5UTG1ZMlk4hp7NfqidtjuvVkSgRJnTFGcoV7HydMxOHi9rNPy2l3FDBW_-r3fdLdfDq_PvvSX3z7_PXs40XvJIilVwNyLtXoR065Njga1Ow7pSYMetDGjUMAyszodNA0MOqV5sy4gQUAJZjgJ927zfe-5B-rr4udp-p8bMP6vFZLDTVGtcKeRpWWg-ZK0_9BQSjQkjf07T_oXV5Lan9uFNftDOLQW2yUK7nW4oO9L9OM5dFSsIfE7J_E7CExuyXWZB822ZRCLjM-5BJHu-BjzCUUTG6qlj_h8GZzCJgt3pYmuLlqgASgWrQl8l9ZWaIh</recordid><startdate>20150102</startdate><enddate>20150102</enddate><creator>Amogu, O</creator><creator>Esteves, M</creator><creator>Vandervaere, J-P</creator><creator>Malam Abdou, M</creator><creator>Panthou, G</creator><creator>Rajot, J-L</creator><creator>Souley Yéro, K</creator><creator>Boubkraoui, S</creator><creator>Lapetite, J.-M</creator><creator>Dessay, N</creator><creator>Zin, I</creator><creator>Bachir, A</creator><creator>Bouzou Moussa, I</creator><creator>Faran Maïga, O</creator><creator>Gautier, E</creator><creator>Mamadou, I</creator><creator>Descroix, L</creator><general>Taylor & Francis</general><general>Taylor & Francis Ltd</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7ST</scope><scope>7TG</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope><scope>SOI</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>H97</scope></search><sort><creationdate>20150102</creationdate><title>Runoff evolution due to land-use change in a small Sahelian catchment</title><author>Amogu, O ; 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| ispartof | Hydrological sciences journal, 2015-01, Vol.60 (1), p.78-95 |
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| subjects | Catchments changements d'usage des sols coefficient d'écoulement Constants crusted soils duration of flow durée de l'écoulement Editors Evolution Freshwater hydrologic cycle Hydrology Land use land use change land-use changes Neighbouring rivers Runoff runoff coefficient Sahel sols encroutés topsoil watersheds |
| title | Runoff evolution due to land-use change in a small Sahelian catchment |
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