[1]CHEN Xi-mei,XIONG Hei-gang,ZHAO Ming-yan.Response of the Groundwater Dynamic Change Based on C.W.Cobb-P.H.Douglas Function Model to the Different Crop Yield and Irrigation Amount—A Case Study of Well-based Irrigation Area in Qitai County in Xinjing[J].Research of Soil and Water Conservation,2009,16(04):137-141.
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Response of the Groundwater Dynamic Change Based on C.W.Cobb-P.H.Douglas Function Model to the Different Crop Yield and Irrigation Amount—A Case Study of Well-based Irrigation Area in Qitai County in Xinjing
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
16
Number of periods:
2009 04
Page number:
137-141
Column:
Public date:
2009-08-20
- Title:
- Response of the Groundwater Dynamic Change Based on C.W.Cobb-P.H.Douglas Function Model to the Different Crop Yield and Irrigation Amount—A Case Study of Well-based Irrigation Area in Qitai County in Xinjing
- CLC:
- F303.4;TV211.12
- DOI:
- -
- Abstract:
- According to data on groundwater depth, field survey, and agrometeorological data, the groundwater depth dynamic change model based on the Cobb-Douglas Production Function was simulated. It had been passed the accuracy test. According to the elastic coefficients to the model, the influences were grain crop yield (0.639) >vegetable and melon yield (0.205) >human factor (0.143) >economic crop yield (0.120) >annual mean temperature (0.063) >annual precipitation (0.024) in turn. And the major role causing the decline of groundwater level was calculated on the basis of the above simulations. The results showed that the major role among the crops, grain crop yield was the first, being 0.356 m/a, while cash crop yield is the least, being 0.073 m/a. On the other hand, the calculation of decline of groundwater caused by irrigation displayed that grain crop also occupies the first position, being 0.339 m/a. While cash crop is still the least, being 0.071 m/a. The errors between the two results above were all less than 5%. With the decline of groundwater level, a series ecological and environmental problems had been caused which had become the key factors restricting the socio-economic sustainable development of Qitai. Therefore, it is the key time to adjust planting structure in order to achieve sustainable use of the groundwater in the Qitai.
- References:
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