TOPSIS模型对农田土地平整方式的综合评价

采用TOPSIS模型,对不同规格的样本田块以内蒙古河套灌区2种常见的平地方式（激光平地和传统方式平地）进行综合评价.首先,在2011—2013年间进行样本的选取及数据的收集工作,并确定评价指标;其次,对各评价指标进行试验及计算,构建评价指标体系;然后,采用TOPSIS模型对评价指标体系进行综合评价;最终得到适用于各样本条件下的优选方案,并结合内蒙古河套灌区实情进行分析.结果表明,田块规格在1 100 m^2以下时,宜选用传统方式进行田块土地平整;田块规格在2 000 m^2以上时激光平地的效果要远优于传统方式;当田块规格在1 100-2 000 m^2时,2种平地方式差异并不大.不过,综合分析激光控制平地更优于传统平地.目前,内蒙古河套灌区多以畦灌为主,田块面积较小,一般为1 000-1 330 m^2,局部地区在670 m^2以下,这既限制了当地大面积推广激光控制平地技术,又限制了当地农业经济的发展.

Comprehensive evaluation on farmland leveling methods based on TOPSIS model

A comprehensive evaluation of the two common leveling methods （laser leveling and traditional leveling method） , based on the TOPSIS model was conducted on various specifications of sample plots in Hetao Irrigation District of Inner Mongolia. Firstly, the selection of samples from 2011 to 2013 and the collection of data was done, and the assessment parameters were confirmed. Then, an evaluation index system was built on the basis of estimation and test of each parameter. Thus, the TOPSIS model was utilized to evaluate the assessment index system comprehensively. Finally, the optimal cases for each sample was reached, and the practical analysis in Hetao Irrigation District of Inner Mongolia was finished. Results indicate that the appropriate leveling method is the traditional one when the area of fields are below 1 100 m^2. The laser leveling methodology is superior to the traditional method if the field area is bigger than 2 000 m^2. Only small differences can be observed once the field area is between 1 100 and 2 000 m^2. By the comprehensive consideration, the laser leveling method can be generally better than the traditional one. Currently, the border irrigation is main method for Hetao Irrigation District in Inner Mongolia, and the acreage of those borders are small and ranges from 1 000 to1 330 m^2, and in some local area the acreage is less than 670 m^2. This will limit not only the largely popularization of laser land leveling technology, but also the development of local agricultural economy.