Theory of stability, and regulation and control of ecological system in oasis

Pan, Xiaoling; Jiping, Chao

doi:10.1016/s0921-8181(02)00201-1

Cited by 29 publications

(14 citation statements)

References 2 publications

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“…SWC is affected by land-use type and pasture management, which control plant canopy cover, leaf area, plant evaporation and community composition (Cooper et al, 2006;Chen et al, 2008Chen et al, , 2010Huang et al, 2013). Due to intensive livestock and agricultural use, the Hexi corridor region faces the consequences of widespread vegetation and soil degradation, such as lower grass yields, grassland desertification, lower carrying capacity, and loss of nutrients via wind erosion during the recent several decades (Li et al, 2009a;Pan and Chao, 2003). Meanwhile, the arid ecosystem is defined by an arid-fed environment and high rates of potential evapotranspiration (Collins et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of rest-grazing management on soil water and carbon storage in an arid grassland (China)

Wang

Liu

et al. 2015

Journal of Hydrology

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Section: Introductionmentioning

confidence: 99%

Effect of rest-grazing management on soil water and carbon storage in an arid grassland (China)

Wang

Liu

et al. 2015

Journal of Hydrology

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“…To sustain the irrigated agricultural system, the over-exploitation of water resources has led to the discharge in the lower basin of the river, and more than 30 tributaries and terminal lakes have dried up. The environmental degradation, secondary salinization, and desertification have become the main obstacle to the sustainable development of oasis ecosystem in the Heihe River basin (Pan and Chao 2003;Su et al 2007). Therefore, studies on water requirements and the resulting impacts on the stability of the oasis ecosystem are theoretically and practically indispensable for the sustainable development in arid regions.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, scientists have obtained some research results about water requirements (Lei et al 2006a, b;Tang et al 2007) and stability (Pan and Chao 2003;Luo et al 2006) of the oasis ecosystem. However, little is known about the stability of the oasis ecosystem from hydrothermal balance in arid regions.…”

Section: Introductionmentioning

confidence: 99%

Water requirements and stability of oasis ecosystem in arid region, China

et al. 2009

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This research was conducted to determine the water requirements of oasis ecosystem with crop evapotranspiration method, and to analyse the water balance between the supply and requirement using water balance model, and then assess the stability of oasis ecosystem in the middle of Heihe River basin, China. The results indicated that the summations of the water supply and requirement approximated to 82.54 and 110.13 Mm 3 years -1 in 2007, and the water deficit was 27.59 Mm 3 years -1 . The farmland was the largest water consumer with a consumption of 57.07 Mm 3 years -1 and accounted for 51.82% of the total water requirements. It was followed by the water area 38.83 Mm 3 years -1 , forestland 12.13 Mm 3 years -1 and domestic and industrial 2.10 Mm 3 years -1 , and accounted for 35.26, 11.01 and 1.92%, respectively. The stability index was 0.74, which implies that the oasis ecosystem have already started degenerating in sub-stability state. However, the water requirement of unit area was 1243.70 mm years -1 and larger than other oases in arid region of China, which implies that the water resource scarcity do not exist in the middle basin where the excessive waste of the flood irrigation method has broken the balance between the water supply and requirement in the basin scale.

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“…Although oases accout for only 4-5% of the total area of these regions, more than 90% of the population and more than 95% of social wealth are concentrated within these areas (Han 2001). Some oasis exists in the desert of drought climate area of northwest China (Pan and Chao 2003). Irrigation is essential for maintaining the productivity of oasis agriculture, but excessive irrigation can usually cause the shallow groundwater table to rise and the soil to become more saline, finally reducing pore space and inhibiting its ability to hold air and nutrients (O'Hara 1997).…”

Section: Introductionmentioning

confidence: 99%

Soil salinity evolution and its relationship with dynamics of groundwater in the oasis of inland river basins: case study from the Fubei region of Xinjiang Province, China

Wang

Xiao

et al. 2007

Environ Monit Assess

116

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Soil salinization is an important worldwide environmental problem, especially in arid and semi-arid regions. Knowledge of its temporal and spatial variability is crucial for the management of oasis agriculture. The study area has experienced dramatic change in the shallow groundwater table and soil salinization during the 20th century, especially in the past two decades. Classical statistics, geostatistics and geographic information system (GIS) were applied to estimate the spatial variability of the soil salt content in relation to the shallow groundwater table and land use from 1983 to 2005. Consumption of reservoir water for agricultural irrigation was the main cause of a rise in the shallow groundwater table under intense evapotranspiration conditions, and this led indirectly to soil salinization. The area of soil salt accumulation was greater in irrigated than in non-irrigated landscape types with an increasing of 40.04% from 1983 to 2005 in cropland at approximately 0.43 t ha(-1) year(-1), and an increase at approximately 0.68 t ha(-1) year(-1) in saline alkaline land. Maps of the shallow groundwater table in 1985 and 2000 were used to deduce maps for 1983 and 1999, respectively, and the registration accuracy was 99%.

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Theory of stability, and regulation and control of ecological system in oasis

Cited by 29 publications

References 2 publications

Effect of rest-grazing management on soil water and carbon storage in an arid grassland (China)

Effect of rest-grazing management on soil water and carbon storage in an arid grassland (China)

Water requirements and stability of oasis ecosystem in arid region, China

Soil salinity evolution and its relationship with dynamics of groundwater in the oasis of inland river basins: case study from the Fubei region of Xinjiang Province, China

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