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Journal articles on the topic 'Baboons – Namibia – Kuiseb River'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Paillou, Philippe, Sylvia Lopez, Eugene Marais, and Klaus Scipal. "Mapping Paleohydrology of the Ephemeral Kuiseb River, Namibia, from Radar Remote Sensing." Water 12, no. 5 (May 19, 2020): 1441. http://dx.doi.org/10.3390/w12051441.

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The Kuiseb River is one of the major ephemeral rivers of Western Namibia, setting the northern limit of the Namib Sand Sea and outflowing in the Atlantic Ocean at Walvis Bay. Such ephemeral rivers are of the highest importance for the country since they are related both to recent past climatic conditions and to potential water resources. Using high-resolution radar images from the Japanese ALOS-2 satellite, we mapped for the first time the numerous channels hidden under the surface aeolian sediments: while the non-permanent tributaries of the Kuiseb River appear north of its present-day bed, a wide paleochannel system running westward, assumed by previous studies, could be clearly observed in the interdune valleys in the south. Radar-detected channels were studied during fieldwork in May 2019, which produced both subsurface ground-penetrating radar profiles and high-resolution drone-generated digital elevation models. It allowed us to confirm the existence of the “Paleo–Kuiseb” drainage system, a remnant of the Holocene history of the Kuiseb River, moving northward under the progression of the Namib Sand Sea. Our observations also contribute to the explanation of the young age of the linear dunes at the northern edge of the Namib Sand Sea, which are currently active and are pushing the Kuiseb River course toward the north.

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2

SLATTERY, MICHAEL C. "BARCHAN MIGRATION ON THE KUISEB RIVER DELTA, NAMIBIA." South African Geographical Journal 72, no. 1 (April 1990): 5–10. http://dx.doi.org/10.1080/03736245.1990.9713540.

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3

BARNES, J. "BARCHAN DUNES ON THE KUISEB RIVER DELTA, NAMIBIA." South African Geographical Journal 83, no. 3 (September 2001): 283–92. http://dx.doi.org/10.1080/03736245.2001.9713747.

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4

Srivastava, Pradeep, George A. Brook, Eugene Marais, P. Morthekai, and Ashok K. Singhvi. "Depositional environment and OSL chronology of the Homeb silt deposits, Kuiseb River, Namibia." Quaternary Research 65, no. 3 (May 2006): 478–91. http://dx.doi.org/10.1016/j.yqres.2006.01.010.

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AbstractPrevious studies suggest that the Homeb silts of the Kuiseb valley, Namibia (i) accumulated in a dune-dammed lake, (ii) are end-point deposits, (iii) represent an aggrading river bed, and (iv) are slackwater deposits. Thus, they have been used alternatively as evidence of past drier conditions or past wetter conditions. Lithostratigraphic analysis of two sediment sequences at Homeb indicates sedimentation by aggradation of the Kuiseb River triggered by a transition from an arid to humid climate. OSL ages for the sequences were obtained by the SAR protocol on aliquots of 9.6-mm and 4.0-mm diameter and on single grains. Four-millimeter aliquot minimum ages closely approximate the single-grain minimum ages and are younger than 9.6-mm aliquot minimum and central ages. Based on these results, the small-aliquot (4-mm) approach appears to provide ages comparable to those obtained by the more laborious and time-consuming single-grain method. Minimum ages indicate rapid deposition of the Homeb Silts in at least two episodes centered at ∼15 ka and ∼6 ka during climate transitions from arid to humid. Flash floods eroded the valley fills during slightly more arid conditions.

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5

Morin, Efrat, Tamir Grodek, Ofer Dahan, Gerardo Benito, Christoph Kulls, Yael Jacoby, Guido Van Langenhove, Mary Seely, and Yehouda Enzel. "Flood routing and alluvial aquifer recharge along the ephemeral arid Kuiseb River, Namibia." Journal of Hydrology 368, no. 1-4 (April 2009): 262–75. http://dx.doi.org/10.1016/j.jhydrol.2009.02.015.

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6

Grodek, Tamir, Efrat Morin, David Helman, Itamar Lensky, Ofer Dahan, Mary Seely, Gerardo Benito, and Yehouda Enzel. "Eco-hydrology and geomorphology of the largest floods along the hyperarid Kuiseb River, Namibia." Journal of Hydrology 582 (March 2020): 124450. http://dx.doi.org/10.1016/j.jhydrol.2019.124450.

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7

Smith, R. M. H., T. R. Mason, and J. D. Ward. "Flash-flood sediments and ichnofacies of the Late Pleistocene Homeb Silts, Kuiseb River, Namibia." Sedimentary Geology 85, no. 1-4 (May 1993): 579–99. http://dx.doi.org/10.1016/0037-0738(93)90103-c.

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8

Ringrose, Susan, Mary Seely, Wilma Matheson, Lin Cassidy, Thebe Kemosidile, Sorcha Diskin, and Stephan Coetzee. "Nature and possible origins of hyper-arid floodplain islands: exemplified by the Kuiseb river, Namibia." Transactions of the Royal Society of South Africa 73, no. 2 (March 22, 2018): 143–57. http://dx.doi.org/10.1080/0035919x.2018.1435430.

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9

Heine, Klaus, and Jan T. Heine. "A paleohydrologic reinterpretation of the Homeb Silts, Kuiseb River, central Namib Desert (Namibia) and paleoclimatic implications." CATENA 48, no. 1-2 (June 2002): 107–30. http://dx.doi.org/10.1016/s0341-8162(02)00012-7.

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10

Botes, A., J. Henderson, T. Nakale, K. Nantanga, K. Schachtschneider, and M. Seely. "Ephemeral rivers and their development: testing an approach to basin management committees on the Kuiseb River, Namibia." Physics and Chemistry of the Earth, Parts A/B/C 28, no. 20-27 (January 2003): 853–58. http://dx.doi.org/10.1016/j.pce.2003.08.028.

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11

Ringrose, Susan, Wilma Matheson, Mary Seely, Lin Cassidy, Stephan Coetzee, and Thebe Kemosidile. "Aspects of floodplain deposition in semi-arid ephemeral rivers, examples from the Kuiseb river valley, central Namibia." Transactions of the Royal Society of South Africa 69, no. 3 (September 2, 2014): 187–93. http://dx.doi.org/10.1080/0035919x.2014.953623.

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12

Badenhorst, Shaw, and Jackson S. Kimambo. "The frequency of butchery marks on goat (Capra hircus) remains from pastoral Khoekhoe villages at Gobabeb, Namibia." Indago 36 (December 2020): 1–12. http://dx.doi.org/10.38140/00679208/indago.v36.a1.

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Khoekhoe pastoralists living in Gobabeb, in the arid Kuiseb River Valley of central-western Namibia, keep goats (Capra hircus). Several decades ago, palaeontologist C.K. Brain collected modern skeletal remains of goats from these villages. The goats were butchered using pocketknives with metal blades. We investigated the frequency of butchery marks on a sub-sam- ple of this collection, representing 60% of the total assemblage. Most specimens in the collection are weathered. Moreover, most goat specimens from Gobabeb lack butchery evidence and even the use of magnification only marginally increased this number. We compared our results with the frequency of butchery marks documented from Early and Middle Iron Age samples from South Africa, a time when sheep dominated faunal assemblages and were slaughtered using metal knives. The frequency of specimens with butchery marks in the goat sample from Gobabeb is higher than that recorded for the Early and Middle Iron Age samples. The higher frequency of butchery marks on the goat remains from Gobabeb may relate to aspects such as the butchering method and style, as well as the large size of the specimens themselves.

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13

Arnold, S., S. Attinger, K. Frank, and A. Hildebrandt. "Uncertainty in parameterisation and model structure affect simulation results in coupled ecohydrological models." Hydrology and Earth System Sciences 13, no. 10 (October 6, 2009): 1789–807. http://dx.doi.org/10.5194/hess-13-1789-2009.

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Abstract. In this paper we develop and apply a conceptual ecohydrological model to investigate the effects of model structure and parameter uncertainty on the simulation of vegetation structure and hydrological dynamics. The model is applied for a typical water limited riparian ecosystem along an ephemeral river: the middle section of the Kuiseb River in Namibia. We modelled this system by coupling an ecological model with a conceptual hydrological model. The hydrological model is storage based with stochastical forcing from the flood. The ecosystem is modelled with a population model, and represents three dominating riparian plant populations. In appreciation of uncertainty about population dynamics, we applied three model versions with increasing complexity. Population parameters were found by Latin hypercube sampling of the parameter space and with the constraint that three species should coexist as observed. Two of the three models were able to reproduce the observed coexistence. However, both models relied on different coexistence mechanisms, and reacted differently to change of long term memory in the flood forcing. The coexistence requirement strongly constrained the parameter space for both successful models. Only very few parameter sets (0.5% of 150 000 samples) allowed for coexistence in a representative number of repeated simulations (at least 10 out of 100) and the success of the coexistence mechanism was controlled by the combination of population parameters. The ensemble statistics of average values of hydrologic variables like transpiration and depth to ground water were similar for both models, suggesting that they were mainly controlled by the applied hydrological model. The ensemble statistics of the fluctuations of depth to groundwater and transpiration, however, differed significantly, suggesting that they were controlled by the applied ecological model and coexistence mechanisms. Our study emphasizes that uncertainty about ecosystem structure and intra-specific interactions influence the prediction of the hydrosystem.

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14

Arnold, S., S. Attinger, K. Frank, and A. Hildebrandt. "Parameterization and uncertainty in coupled ecohydrological models." Hydrology and Earth System Sciences Discussions 6, no. 3 (June 9, 2009): 4155–207. http://dx.doi.org/10.5194/hessd-6-4155-2009.

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Abstract. In this paper we develop and apply a conceptual ecohydrological model to investigate the effects of model structure and parameter uncertainty on the prediction of vegetation structure and hydrological dynamics. The model is applied for a typical water limited riparian ecosystem along an ephemeral river: the middle section of the Kuiseb River in Namibia. We modelled this system by coupling an ecological model with a conceptual hydrological model. The hydrological model is storage based with stochastical forcing from the flood. The ecosystem is modelled with a population model, and represents three dominating riparian plant populations. In appreciation of uncertainty about population dynamics, we applied three model versions with increasing complexity. Population parameters were found by Latin Hypercube sampling of the parameter space and with the constraint that three species should coexist as observed. Two of the three models were able to reproduce the observed coexistence. However, both models relied on different coexistence mechanisms, and reacted differently to change of long term memory in the flood forcing. The coexistence requirement strongly constrained the parameter space for both successful models. Only very few parameter sets (0.5% of 150 000 samples) allowed for coexistence in a representative number of repeated simulations (at least 10 out of 100) and the success of the coexistence mechanism was controlled by the combination of population parameters. The average values of hydrologic variables like transpiration and depth to ground water were similar for both models, suggesting that they were mainly controlled by the applied hydrological model. The fluctuations of depth to groundwater and transpiration, however, differed significantly, suggesting that they were controlled by the applied ecological model and coexistence mechanisms. Our study emphasizes that uncertainty about ecosystem structure and intra-specific interactions influence the prediction of the hydrosystem.

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15

Kalola, Moses Shidalwomunhu, Nnenesi Anna Kgabi, and Henry Mutafela Mukendwa. "Geochemical assessment of groundwater in the Kuiseb River basin in Namibia." Physics and Chemistry of the Earth, Parts A/B/C, November 2020, 102956. http://dx.doi.org/10.1016/j.pce.2020.102956.

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