The suitable scale and structural change of oasis in Minqin Basin after ecological water conveyance project construction

doi:10.7522/j.issn.1000-694X.2020.00076

Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (6): 91-97.DOI: 10.7522/j.issn.1000-694X.2020.00076

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The suitable scale and structural change of oasis in Minqin Basin after ecological water conveyance project construction

Sen Li¹^,²^,⁴(), Tao Wang¹, Zhishan Zhang³, Changzhen Yan¹, Zhongchao Mao³

^1.. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China； 100049，China
^2.Drylands Salinization Research Station，Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
^3.Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
^4.University of Chinese Academy of Sciences，Beijing

Received:2020-06-01 Revised:2020-07-07 Online:2020-12-09 Published:2020-12-09

Abstract

Abstract:

In order to study the impact of ecological water conveyance project on the suitable scale and structure of oasis in the lower reaches of inland river， we calculated the appropriate scale and structure of oasis before and after ecological water conveyance project to reflect the impact of ecological water conveyance on the scale and structure of oasis based on the principle of water-heat balance and oasis circle theory in the oasis of Minqin Basin in the lower Shiyang River， China. The results show that the ecological water conveyance project not only increased the available water resources in the oasis of Minqin Basin， but also optimized the water consumption structure of non-artificial oasis. The ecological water conveyance project had improved the suitable oasis scale and the suitable cultivated land scale and optimized the oasis structure in the Minqin Basin to a certain extent. The area of the suitable oasis and cultivated land had increased from 366.70-550.05 km² and 242.72-246.55 km² in 2000 to 691.54-1 037.31 km² and 523.13-530.20 km² in 2015， respectively， and the stability of the oasis also developed from near instability to stable state. However， compared with the actual area and structure of oasis， the stability and structure of oasis is still in a sub stable state. Therefore， it is necessary to adjust the structure of oasis in order to stabilize the oasis in Minqin Basin.

Key words: oasis, suitable scale, suitable structure, Minqin Basin

CLC Number:

P967

Sen Li, Tao Wang, Zhishan Zhang, Changzhen Yan, Zhongchao Mao. The suitable scale and structural change of oasis in Minqin Basin after ecological water conveyance project construction[J]. Journal of Desert Research, 2020, 40(6): 91-97.

Figures/Tables 6

References 31

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指标	2000年	2006年	2010年	2015年
非重复性地下水资源量/万m³	6 400	6 400	6 400	6 400
红崖山水库出库水量/万m³	7 808	15 196	24 004	25 306
青土湖输水量/万m³	—	—	1 290	2 833
城市用水定额/(L·d^-1)	150	110	75	75
农村用水定额/( L·d^-1)	60	50	50	40
万元工业产值用水/m³	137	105	73	73
城镇人口/万人	3.31	3.57	4.62	7.28
农村人口/万人	26.96	26.57	19.51	16.48
工业产值/亿元	1.00	3.50	4.96	15.39

指标	2000年	2006年	2010年	2015年
非重复性地下水资源量/万m³	6 400	6 400	6 400	6 400
红崖山水库出库水量/万m³	7 808	15 196	24 004	25 306
青土湖输水量/万m³	—	—	1 290	2 833
城市用水定额/(L·d^-1)	150	110	75	75
农村用水定额/( L·d^-1)	60	50	50	40
万元工业产值用水/m³	137	105	73	73
城镇人口/万人	3.31	3.57	4.62	7.28
农村人口/万人	26.96	26.57	19.51	16.48
工业产值/亿元	1.00	3.50	4.96	15.39

评价等级	H₀	绿洲生态趋势	绿洲规模评价
超稳定	>0.75	异质性将增加	具有开发潜力
稳定	0.50～0.75	保持平衡	在良好的措施保障下，具有较小的开发潜力
亚稳定	0.20～0.50	开始退化	不具备开发潜力
不稳定	<0.20	退化	须缩小绿洲规模以维持绿洲稳定

评价等级	H₀	绿洲生态趋势	绿洲规模评价
超稳定	>0.75	异质性将增加	具有开发潜力
稳定	0.50～0.75	保持平衡	在良好的措施保障下，具有较小的开发潜力
亚稳定	0.20～0.50	开始退化	不具备开发潜力
不稳定	<0.20	退化	须缩小绿洲规模以维持绿洲稳定

年份	参考作物蒸发蒸腾量/mm	降水量/mm	绿洲适宜规模/km²		绿洲实际规模/km²	稳定性指数
年份	参考作物蒸发蒸腾量/mm	降水量/mm	H₀=0.5	H₀=0.75	绿洲实际规模/km²	稳定性指数
2000	765.50	122.20	550.05	366.70	1 143.91	0.24
2006	889.60	126.80	738.17	492.11	1 268.04	0.29
2010	907.90	111.80	977.84	651.90	1 264.80	0.39
2015	860.60	122.00	1 037.31	691.54	1 130.26	0.46

The suitable scale and structural change of oasis in Minqin Basin after ecological water conveyance project construction

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年份	实际耕地面积/km²	适宜耕地面积/km²		过渡带适宜宽度/km		过渡带实际宽度/km
年份	实际耕地面积/km²	H₀=0.5	H₀=0.75	H₀=0.5	H₀=0.75	过渡带实际宽度/km
2000	1 056.49	246.55	242.72	3.73	1.38	1.18
2006	1 192.08	396.41	388.97	3.28	0.58	1.04
2010	1 166.24	516.77	516.90	3.89	0.65	0.98
2015	1 003.86	530.20	523.13	4.24	1.00	3.15

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