Improved hydrological understanding of a semi-arid subtropical transboundary basin using multiple techniques -- The Incomati River Basin:

This study aims at improving the hydrological process understanding of the semi-arid and transboundary Incomati river basin to enable better water management. Comprehensive statistical and trend analysis of rainfall and streamflow were conducted, and the Indicators of Hydrological Alteration tool wa...

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Bibliographic Details
Main Author: Okello, Aline Marachi Lopes Saraiva (Author)
Format: Electronic eBook
Language:English
Published: Leiden, Netherlands CRC Press 2019
Series:IHE Delft PhD Thesis Series
Subjects:
Online Access:Volltext
Summary:This study aims at improving the hydrological process understanding of the semi-arid and transboundary Incomati river basin to enable better water management. Comprehensive statistical and trend analysis of rainfall and streamflow were conducted, and the Indicators of Hydrological Alteration tool was deployed to describe the streamflow regime and trends over time. Land use and land cover change, particularly the conversion of natural vegetation into forest plantation, the expansion of irrigated agriculture and the flow regulation due to dam operation were identified as critical drivers of flow regime alteration. Hydrograph separation using long-term hydrochemical data at seasonal scale, and hydrochemical and isotope data at event scale were performed to quantify runoff components. A novel methodology to calibrate recursive digital filters using routinely collected water quality data was developed and tested in the catchment. This method allows for estimation of daily baseflow from readily available daily streamflow data. Dominant runoff generation zones were mapped using the Height Above Nearest Drainage approach. The hydrological model STREAM was then employed, informed by the runoff generation zones mapping and the process understanding gained in the catchment, as well as remote sensing data. The study provides the basis for better operational water management in the catchment
Item Description:OCLC-licensed vendor bibliographic record
Physical Description:1 online resource (xxvi, 218 pages)
ISBN:9780429299537
0429299532
9781000044027
1000044025
9781000034349
1000034348
9781000039184
1000039188

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