| Cite this article: | 黄永江,屈忠义.基于PCA和GRA-TOPSIS相耦合的灌区用水效率评价模型构建与应用[J].灌溉排水学报,0,():-. |
| HUANG Yong-jiang,QU Zhong-yi.基于PCA和GRA-TOPSIS相耦合的灌区用水效率评价模型构建与应用[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 1407Times Download 0Times |
|
|
|
| DOI： |
|
| Establishment and application of evaluation model for water use efficiency in irrigation district based on PCA and GRA-TOPSIS decoupling |
|
HUANG Yong-jiang, QU Zhong-yi
|
|
Inner Mongolia Agricultural University Institute of Water Conservancy and Civil Engineering
|
| Abstract: |
| 【Objective】For scientifically and reasonably evaluating water use efficiency in irrigation district and providing decision-making basis for irrigation district reformation and construction.【Method】evaluation index system considering water use level, engineering status, management level and irrigation technology level is established. On this basis. Comprehensive evaluation model of principal component analysis(PCA) and grey relation analysis(GRA) and technique for order preference by similarity to ideal solution(TOPSIS) decoupling was constructed .Five large-scale irrigation districts in the Yellow River irrigation district in Inner Mongolia were chosen as the case study to validate this model.【Result】The rankings of water use efficiency in various irrigation districts obtained by PCA and GRA- TOPSIS decoupling model and GRA-TOPSIS model are completely consistent. And fuzzy matter element analysis (FMA) model is basic consistent. Which shows that the evaluation result based on PCA and GRA- TOPSIS decoupling model is reasonable. The extreme differences and coefficients of variation of the evaluation results obtained by PCA and GRA- TOPSIS decoupling model are 0.501, 0.448, 0.500 and 0.699, 0.450, 0.921 respectively. The coefficients of variation obtained by PCA and GRA-TOPSIS decoupling method is higher than that of the other two methods, which is more conducive to visually distinguish the irrigation water efficiency level of each irrigation district and more suitable for classifying the irrigation water efficiency in irrigation districts. the evaluation results based on PCA and GRA- TOPSIS decoupling model meet the actual conditions of each irrigation district. And evaluation result is Reliable.【Conclusion】PCA and GRA- TOPSIS decoupling model is more suitable to evaluate water use efficiency in irrigation district |
| Key words: evaluation index;irrigation water use efficiency;PCA and GRA- TOPSIS decoupling model |
|
|
|
|
|
|
