Modeling the impact of land use changes on river flows in arror watershed, Elgeyo Marakwet county, Kenya

被引：1

作者：

Chebet C. ^{[1
]}

Odenyo V.A.O. ^{[2
]}

Kipkorir E.C. ^{[3
]}

机构：

[1] Department of Environmental Monitoring, Planning and Management, University of Eldoret, P.O. Box 1125, Eldoret

[2] Department of Monitoring, Planning and Management, University of Eldoret, P.O. Box 1125, Eldoret

[3] Department of Civil and Structural Engineering, Moi University, P.O. Box 3900, Eldoret

来源：

Chebet, Catherine (catherinesange9@gmail.com) | 1600年 / IWA Publishing卷 / 12期

关键词：

Arror; Catchment; GIS; Streamflow; SWAT;

D O I：

10.2166/wpt.2017.028

中图分类号：

学科分类号：

摘要：

Water scarcity has become a serious global problem. Therefore, there is an urgent need to understand land use changes in watershed areas and their impact on river flows. This study models the impact of land use changes on river flows in the Arror watershed in Elgeyo Marakwet County, Kenya. The primary study sources included remotely sensed and socio-economic data. Landsat 5 thematic mappers for 1986, 2000 and 2012 (resolution 30 m) were used. A 90 m Digital Elevation Model resolution was used to delineate the Arror watershed. Secondary data included climate, river discharge and soil data. Field surveys and questionnaires were used to collect socioeconomic data. GIS was integrated with a Soil and Water Assessment Tool model to determine the impact of land use changes on water quantity. The calibration goodness of fit results for the model were 0.9 and 0.8, for EF (Nash-Sutcliffe Efficiency) and R-squared, respectively. The results show a reduction of 3.5% of deciduous forest and 11.8% of grassland, while agricultural land increased by 14.3% from 1986 to 2012. The 1986, 2000 and 2012 land uses yielded an annual average flow of 2.0, 2.5 and 1.9 m3/s respectively. Flow variation was attributed mainly to land use changes. Agroforestry and afforestation are recommended for sustainable watershed management. © IWA Publishing 2017.

引用

页码：344 / 353

页数：9

共 18 条

[1]

Anderson J.R., Hardy E.E., Roach J.T., Witmer R.E., A Land Use and Land Cover Classification System for Use with Remote Sensor Data, (1976)

[2]

Arnold J.G., Allen P.M., Estimating hydrologic budgets for three Illinois watersheds, Journal of Hydrology, 176, 14, pp. 57-77, (1996)

[3]

Arnold J.G., Kiniry J.R., Srinivasan R., Williams J.R., Haney E.B., Neitsch S.L., 2012 Soil and Water Assessment Tool: Input/Output Documentation Version 2012

[4]

Fisher A.A., Laing J.E., Stoeckel J.E., Townsend J.W., Handbook for Family Planning Operations Research Design, Population Council, (1991)

[5]

Grimes D.I., Pardo-Iguzquiza E., Geostatistical analysis of rainfall, Geographical Analysis, 42, 2, pp. 136-160, (2010)

[6]

Feasibility Study on the Integrated Development of the Arror River Basin. KVDA, (1989)

[7]

Masih I., Maskey S., Uhlenbrook S., Smakhtin V., Assessing the impact of areal precipitation input on streamflow simulations using the SWAT model, JAWRA, 47, 1, pp. 179-195, (2011)

[8]

Minder J.R., Mote P.W., Lundquist J.D., Surface temperature lapse rates over complex terrain: Lessons from the Cascade Mountains, J. Geophys. Res, 115, (2010)

[9]

Muchemi J., Mwangi W., Greijn H., Participatory Land Use Planning towards Community-based Natural Resource management in the Districts of Keiyo and Marakwet, Kenya: A GIS and Remote Sensing Approach’. Mimeo, (2002)

[10]

Mwiturubani D.A., Wyk J.V., Climate Change and Natural Resources Conflicts in Africa, Institute of Security Studies, (2010)

← 1 2 →