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Assessment of hydrological pathways in East African montane catchments under different land use

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Title Assessment of hydrological pathways in East African montane catchments under different land use
 
Creator Jacobs, S.R.
Timbe, E.
Weeser, B.
Rufino, Mariana C.
Butterbach-Bahl, Klaus
Breuer, Lutz
 
Subject catchment hydrology
watershed management
water management
reserved forests
soil erosion
 
Description Abstract. Conversion of natural forest (NF) to other land uses could lead to significant changes in catchment hydrology, but the nature of these changes has been insufficiently investigated in tropical montane catchments, especially in Africa. To address this knowledge gap, we aimed to identify stream water (RV) sources and flow paths in three tropical montane sub-catchments (27–36 km2) with different land use (natural forest, NF; smallholder agriculture, SHA; and commercial tea and tree plantations, TTP) within a 1021 km2 catchment in the Mau Forest complex, Kenya. Weekly samples were collected from stream water, precipitation (PC) and mobile soil water for 75 weeks and analysed for stable isotopes of water (δ2H and δ18O) for mean transit time (MTT) estimation with two lumped parameter models (gamma model, GM; and exponential piston flow model, EPM) and for the calculation of the young water fraction. Weekly samples from stream water and potential endmembers were collected over a period of 55 weeks and analysed for Li, Na, Mg, K, Rb, Sr and Ba for endmember mixing analysis (EMMA). Solute concentrations in precipitation were lower than in stream water in all catchments (p 
 
Date 2018-06-30
2021-03-08T08:14:32Z
2021-03-08T08:14:32Z
 
Type Journal Article
 
Identifier Jacobs, S.R., Timbe, E., Weeser, B., Rufino, M.C., Butterbach-Bahl, K., Breuer, L. 2018. Land use alters dominant water sources and flow paths in tropical montane catchments in East Africa. Hydrology and Earth System Sciences, https://doi.org/10.5194/hess-2018-61
1607-7938
https://hdl.handle.net/10568/111824
https://www.cifor.org/library/6935
https://doi.org/10.5194/hess-22-4981-2018
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Publisher Copernicus GmbH