Arid Dune Ecosystems: The Nizzana Sands in the Negev Desert by R. Ben-David, A. Yair (auth.), Siegmar-W. Breckle, Aaron PDF

By R. Ben-David, A. Yair (auth.), Siegmar-W. Breckle, Aaron Yair, Maik Veste (eds.)

ISBN-10: 3540754970

ISBN-13: 9783540754978

ISBN-10: 3540754989

ISBN-13: 9783540754985

Sand dune dynamics performs a key function in lots of arid deserts. This quantity offers a synthesis of a selected sand dune atmosphere, the Nizzana website within the Negev wilderness. Describing its weather and geophysical/geochemical houses of soils, geological historical past, natural world, and past/present land-use styles, it elucidates ecological and geomorphological tactics and their interrelations, in line with long term tracking, in situ experiments and satellite tv for pc imagery. specific cognizance is attracted to the effect of the topsoil organic crust in controlling water availability at local/regional scales. The interdisciplinary procedure followed consequently research bargains a very good instance of a hugely advanced and dynamic procedure, that may simply be utilized to different sandy ecosystems.

This is a helpful resource of data for soil ecologists and microbiologists, conservation biologists, desolate tract ecologists and geographers, geomorphologists, soil scientists and climatologists, teachers, coverage makers and others drawn to deserts and desertification.

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Extra info for Arid Dune Ecosystems: The Nizzana Sands in the Negev Desert

Example text

6 shows sand transport roses for these three stations. u. (Fig. 6). The differences in the DP values ensue from different wind recorders and different periods of records. However, all these values indicate a low-energy wind environment (Fryberger 1979). u. and higher (Tsoar 2001, 2005; Yizhaq et al. 2007), which indicate a very high wind energy. The sand-transporting winds in the Nizzana area have a seasonal shift. The strongest winds occur during winter and spring when a depression exists over 32 H.

Accordingly, the leeward slope is not merely a zone of deposition but also a zone of erosion by the diverted wind flow (Tsoar et al. 1985). The occurrence of erosion or deposition depends upon the angle of incidence between the wind and the crest line. When this angle is < 40°, the deflected wind has the power to erode sand along the lee slope. When the angle is close to 90°, the velocity of the diverted wind decreases and deposition mainly occurs. As a result, the linear seif dunes develop a waveform (Fig.

It extends over 805 km2. The two main tributaries, in the proximity of the sandy area, are the Lavan and Shunra basins (Fig. 1), extending over 329 and 220 km2 respectively. From a physiographic point of view, the area is constituted by three distinct belts trending SW–NE (Fig. 1). 1. The rocky belt. This belt forms the upper reaches of the Nizzana basin (Negev Heights, Matred-Avdat Plateau and Qetef Shivta), composed of extensive rocky outcrops of Cenomanian to Eocene formations. 2. The alluvial belt.

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Arid Dune Ecosystems: The Nizzana Sands in the Negev Desert by R. Ben-David, A. Yair (auth.), Siegmar-W. Breckle, Aaron Yair, Maik Veste (eds.)


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