Runoff evolution due to land-use change in a small Sahelian catchment

被引：21

作者：

Amogu, O. ^{[1
,2
]}

Esteves, M. ^{[1
]}

Vandervaere, J-P. ^{[3
]}

Abdou, M. Malam ^{[1
,2
,3
,4
]}

Panthou, G. ^{[3
]}

Rajot, J-L. ^{[5
,6
]}

Yero, K. Souley ^{[1
]}

Boubkraoui, S. ^{[1
]}

Lapetite, J. -M. ^{[1
]}

Dessay, N. ^{[7
]}

Zin, I. ^{[8
]}

Bachir, A. ^{[4
]}

Moussa, I. Bouzou ^{[4
]}

Maiga, O. Faran ^{[4
]}

Gautier, E. ^{[9
]}

Mamadou, I. ^{[4
,5
,6
,7
,8
,9
,10
]}

Descroix, L. ^{[1
,2
,3
,4
,5
,6
,7
,8
,9
,10
,11
]}

机构：

[1] UJF Grenoble 1, CNRS, UMR 5564, IRD,G INP,LTHE, F-38041 Grenoble 9, France

[2] Coyne & Bellier, Tractebel Engn France, F-92622 Gennevilliers, France

[3] UJF Grenoble 1, CNRS, UMR 5564, G INP,IRD,LTHE, F-38041 Grenoble 9, France

[4] Univ Abdou Moumouni, Dept Geog, Niamey, Niger

[5] Univ Paris Est, AgroParisTech, CNRS, UMR 7618,IRD,UPMC,INRA,ENS,BIOEMCO, F-94010 Creteil, France

[6] U Paris Diderot, LISA, UMR 7583, UPEC,CNR, F-94010 Creteil, France

[7] UM2, IRD, UAG, UR ESPACE DEV UMR 228, F-34093 Montpellier 5, France

[8] UJF Grenoble 1, CNRS, UMR 5564, G INP,IRD,LTHE, F-38041 Grenoble 9, France

[9] Univ Paris 12, Univ Paris 01, Univ Paris 08, CNRS,UMR 8591, F-92195 Meudon, France

[10] Univ Zinder, Dept Geog, FLSH, Zinder, Niger

[11] IRD, MNHN, UMR PALOC, F-75231 Paris 5, France

来源：

HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES | 2015年 / 60卷 / 01期

关键词：

land-use changes; duration of flow; runoff coefficient; Sahel; crusted soils; CLIMATE-CHANGE; WATER EROSION; RIVER; NIGER; DESERTIFICATION; CLASSIFICATION; INFILTRATION; VARIABILITY; GENERATION; DISCHARGE;

D O I：

10.1080/02626667.2014.885654

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

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

引用

页码：78 / 95

页数：18

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