Journal of Food, Agriculture and Environment

Entropy weight coefficient evaluation of subsurface drainage schemes based on the analysis of surface soil quality variations

Author(s):

You Xin Zhou ¹*, Shu Cong Zhen ¹, Ya Ming Zhai ²

Recieved Date: 2013-07-19, Accepted Date: 2013-09-26

Abstract:

Aiming at the severe environmental problem of soil salinization, 4 subsurface drainage schemes with different buried depth and spacing were designed in a typical area of southeast China, and the indexes of surface soil quality were observed during the experimental periods. Besides, the entropy weight coefficient method was employed in order to realize the optimization of subsurface drainage scheme. The surface soil EC was in a trend of first rise and then fall, and the highest decreasing rate was found in T3, that reached 32.88% at the monitoring month of August. The surface soil pH of different treatments was increased to different extents; T4 got the highest increment of 12.24%, followed by T3, recording as 8.85%. The bulk density was decreased by the drainage system by 1.38- 2.78%; and the increased percentage of soil porosity was in a range of 0.81- 5.47%. According to the model calculations, T3 was selected as the optimum scheme since it obtained the highest value of entropy weight coefficient, which means that the subsurface drainage scheme with depth of 60 cm and spacing of 6 m was optimal for the improvement of surface soil quality in the southeast of China.

Keywords:

Surface soil quality, scheme, entropy weight coefficient method, pH, drainage

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2368-2371

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