Improved hydrological understanding of a semi-arid subtropical transboundary basin using multiple techniques -- The Incomati River Basin /
General Material Designation
[Book]
First Statement of Responsibility
by Aline Maraci Lopes Saraiva Okello.
.PUBLICATION, DISTRIBUTION, ETC
Place of Publication, Distribution, etc.
Leiden, Netherlands :
Name of Publisher, Distributor, etc.
CRC Press,
Date of Publication, Distribution, etc.
2019.
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
1 online resource (xxvi, 218 pages)
SERIES
Series Title
IHE Delft PhD Thesis Series
INTERNAL BIBLIOGRAPHIES/INDEXES NOTE
Text of Note
Includes bibliographical references.
SUMMARY OR ABSTRACT
Text of Note
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.
ACQUISITION INFORMATION NOTE
Source for Acquisition/Subscription Address
Taylor & Francis
Stock Number
9780429299537
OTHER EDITION IN ANOTHER MEDIUM
Title
Improved hydrological understanding of a semi-arid subtropical transboundary basin using multiple techniques -- The Incomati River Basin.