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Natural pans as an important surface water resource in the Cuvelai Basin - metrics for storage volume calculations and identification of potential augmentation sites

Arendt, Robert and Reinhardt-Imjela, Christian and Schulte, Achim and Faulstich, Leona and Ullmann, Tobias and Beck, Lorenz and Martinis, Sandro and Johannes, Patrina and Lengricht, Joachim (2021) Natural pans as an important surface water resource in the Cuvelai Basin - metrics for storage volume calculations and identification of potential augmentation sites. Water, 13 (177), pp. 1-21. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/w13020177. ISSN 2073-4441.

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Abstract

Numerous ephemeral rivers and thousands of natural pans characterize the transboundary Iishana-System of the Cuvelai Basin between Namibia and Angola. After the rainy season, surface water stored in pans is often the only affordable water source for many people in rural areas. High inter- and intra-annual rainfall variations in this semiarid environment provoke years of extreme flood events and long periods of droughts. Thus, the issue of water availability is playing an increasingly important role in one of the most densely populated and fastest growing regions in southwestern Africa. Currently, there is no transnational approach to quantifying the potential storage and supply functions of the Iishana-System. To bridge these knowledge gaps and to increase the resilience of the local people’s livelihood, suitable pans for expansion as intermediate storage were identified and their metrics determined. Therefore, a modified Blue Spot Analysis was performed, based on the high-resolution TanDEM-X digital elevation model. Further, surface area–volume ratio calculations were accomplished for finding suitable augmentation sites in a first step. The potential water storage volume of more than 190,000 pans was calculated at 1.9 km3. Over 2200 pans were identified for potential expansion to facilitate increased water supply and flood protection in the future.

Item URL in elib:https://elib.dlr.de/140406/
Document Type:Article
Title:Natural pans as an important surface water resource in the Cuvelai Basin - metrics for storage volume calculations and identification of potential augmentation sites
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Arendt, RobertFreie Universitaet BerlinUNSPECIFIED
Reinhardt-Imjela, ChristianFreie Universitaet BerlinUNSPECIFIED
Schulte, AchimFreie Universitaet BerlinUNSPECIFIED
Faulstich, LeonaFreie Universitaet BerlinUNSPECIFIED
Ullmann, Tobiastobias.ullmann (at) uni-wuerzburg.deUNSPECIFIED
Beck, LorenzDLRUNSPECIFIED
Martinis, Sandrosandro.martinis (at) dlr.dehttps://orcid.org/0000-0002-6400-361X
Johannes, PatrinaUniversity of NamibiaUNSPECIFIED
Lengricht, JoachimUniversity of NamibiaUNSPECIFIED
Date:2021
Journal or Publication Title:Water
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.3390/w13020177
Page Range:pp. 1-21
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2073-4441
Status:Published
Keywords:Namibia; Angola; Oshana; flood; drought; water retention; storage volume; Blue Spot Analysis; TanDEM-X; pan
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Remote Sensing and Geo Research
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Geo Risks and Civil Security
Deposited By: Martinis, Sandro
Deposited On:14 Jan 2021 15:24
Last Modified:14 Jan 2021 15:24

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