首页|Spatio-temporal Variability of Soil Water at Three Seasonal Floodplain Sites: A Case Study in Tarim Basin, Northwest China

Spatio-temporal Variability of Soil Water at Three Seasonal Floodplain Sites: A Case Study in Tarim Basin, Northwest China

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The floodplain vegetation of the Tarim River in Northwest China is strongly influenced by irrigated agriculture.The abstraction of river water disturbs the natural dynamics of the floodplain ecosystem.The human impact on the hydrological system by bank dams and the irrigation of cotton plantings have caused adverse changes of the Tarim River and its floodplains,so the current stocks of the typical Tugai vegetation show significant signs of degradation.Field studies of soils and statistical analysis of soil moisture data have shown that the vitality of the Tugai vegetation is primarily determined by its position to the riverbank and the groundwater.There exist complex interactions between soil hydrological conditions and the vitality of the vegetation.But the availability of water is not only influenced by the groundwater level and seasonal flood events.The spatial distribution of stocks at different states of vitality seems also to be decisively influenced by physical soil properties.Our results show that the water supply of plant communities is strongly influenced by the soil texture.Spatial differences of soil moisture and corresponding soil water tensions may be the decisive factors for the zonation of vegetation.Physical soil properties control the water retention and rising of capillary water from deeper soil layers and the phreatic zone and may supply the root systems of the phreatophytic vegetation with water.

soil moisturesoil texturesoil water tensionsTarim Riverwater retention

Sven GRASHEY-JANSEN、Martin KUBA、Bernd CYFFKA、(U)müt HALIK、Tayierjiang AISHAN

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Institute of Geography, University of Augsburg, Augsburg 86135, Germany

Applied Physical Geography, Catholic University of Eichstaett-Ingolstadt, Eichstaett 85072, Germany

Key Laboratory of Oasis Ecology, College of Resources and Environmental Science, Xinjiang University,(U)rümqi 830046, China

Under the auspices of Federal Ministry of Education and Research of Germany Project—Sustainable Management of River Oases along National Natural Science Foundation of ChinaNational Natural Science Foundation of China

01LL0918D3127074231360200

2014

10.1007/s11769-014-0717-y

中国地理科学(英文版)
中国科学院长春地理研究所

中国地理科学(英文版)

CSTPCDCSCDSCI
影响因子：0.754
ISSN：1002-0063
年,卷(期)：2014.24(6)
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