Impacts of land use land cover change and climate change on river hydro-morphology- a review of research studies in tropical regions

Details

Ressource 1Download: 1-s2.0-S0022169422012720-main.pdf (6468.24 [Ko])
State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_575E2E284C7D
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Impacts of land use land cover change and climate change on river hydro-morphology- a review of research studies in tropical regions
Journal
Journal of Hydrology
Author(s)
Kayitesi Naomie M., Guzha Alphonce C., Mariethoz Gregoire
ISSN
0022-1694
Publication state
Published
Issued date
12/2022
Peer-reviewed
Oui
Volume
615
Pages
128702
Language
english
Abstract
Tropical regions have experienced the fastest Land Use Land Cover Change (LULCC) in the last decades, coupled with climate change (CC) this has affected the hydrological and geomorphological processes of river systems. With the increased demand for land, the general trend has been the loss of forest land to agriculture and settlements. These changes have altered the water balance components through enhanced or reduced evaporation, peak flow, flooding, and river morphology. The aim of this review paper is to provide a meta-analysis on the effects of spatiotemporal changes in climate and LULC on river hydro-morphology in the tropics. Following a systematic search, 60 case studies were identified, of which the majority (68%) experienced forest loss due to agricultural and urban expansion, resulting in increased streamflow, surface flow, and total water yield and decreased ET and groundwater recharge. 12% of the case studies showed the impacts of LULCC on channel morphology features through sediment transport and riverbank erosion. Results from this study show limited correlation between LULCC and hydrological variables, indicating that there are likely other factors controlling hydrological processes. Catchment heterogeneity including soil and topography play an important role. Based on studies that project these changes into the future, similar trends are expected over the next decades, with differences based on LU and climate scenarios. There are still limited studies on river hydro-morphology responses to LULCC and CC in the tropics despite the major changes taking place there. In light of future changes, more studies are needed to improve our understanding.
Keywords
Water Science and Technology
Web of science
Open Access
Yes
Create date
07/02/2023 11:25
Last modification date
08/02/2023 8:10
Usage data