| This article has been：Browse 1912Times Download 3111Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20180182 |
|
| Evaluating and Analyzing the Water Quality of Natural Lakes in Shenwu Irrigation District during Non-frozen Period |
|
ZHU Ke, LI Weiping*, SHI Haibin, LI Xianyue, YAN Jianwen, WU Di
|
|
Inner Mongolia Agricultural University, Huhhot 010010, China
|
| Abstract: |
| 【Objective】Water quality has a profound impact on ecological functions of irrigation district. This paper analyzed the water quality of natural lakes in Shenwu Irrigation District, as well as its response to implementation of water-saving projects and special irrigation systems.【Method】We analyzed the data collected from eight natural lakes in Shenwu irrigation district from 2016 to 2017 (March to November) using SPSS, and selected CODMn, NH3-N, TN, TP and DO as the evaluation indicators in principle component analysis of the water quality. We also analyzed the mechanisms underlying the change in water quality.【Result】 Water quality of the eight lakes in Shenwu irrigation district dynamically changed during frozen and non-frozen season. The water quality was good from March to May, reaching Class Ⅲ, but fluctuated from June to September between Class Ⅲ and Class Ⅴ. The water quality begun to improve from October to November, with the worst occurring in August and September. 【Conclusion】The water quality of the eight typical lakes fluctuates greatly with time. Implementing the water-saving reconstruction project reduced the water quality in its vicinity. Nitrogen is the main factor affecting the water quality. |
| Key words: the Shenwu irrigation district; natural lakes; the principal component analysis method; water-saving reconstruction project; quality evaluation of natural lake |
|
|
