Degradation of agricultural drainage water quantity and quality due to farmland expansion and water-saving operations in arid basins
Degradation of agricultural drainage water quantity and quality due to farmland expansion and water-saving operations in arid basins
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干旱流域农田扩张和节水作业导致农业排水水量和水质恶化
DOI：
10.1016/j.agwat.2018.10.019
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发表时间：
2019-03
影响因子：
6.7
通讯作者：
Wang Jiusheng
中科院分区：
文献类型：
--
作者：
Hu Qiuli;Yang Yonghui;Han Shumin;Wang Jiusheng
了解农业活动对排水的影响日益成为干旱区水资源管理的重要内容。本文分析了阿克苏河流域近期农业活动变化对农田排水水量和水质的影响。根据2003-2010年的排水分析，节水措施的实施使灌溉定额减少了48%。这反过来又导致2010年的排水水量比2004年减少了44%。Na-Cl是主要的排水类型，受可溶性盐溶解和阳离子交换的驱动。进一步分析表明，2005-2010年，流域水体中总溶解固形物（TDS）增加到4.7-10.8 g/L（平均7.6 g/L）， 2003-2004年下降了28%。与灌溉水相比，排水的TDS是灌溉水的6-18倍。进一步分析表明，虽然农田扩张是导致流域水体TDS增加的主要原因，但地下水开采对流域水体TDS也有影响。因此，建议限制农田扩张和加强节水行动，以防止流向下游生态系统的水流量出现破坏性下降。
Understanding the impacts of agricultural activities on drainage is increasingly important element of water resources management in arid regions. This study analyzed the effects of recent changes in agricultural activities on drainage water quantity and quality from farmlands in Aksu River Basin in Northwest China. Based on drainage water analysis for 2003-2010, implementation water-saving measures resulted in the reduction of irrigation quota by up to 48%. This in turn resulted in a decline in drainage water by up to 44% in 2010, compared with that in 2004. Na-Cl was the main drainage water type, driven by the dissolution of soluble salts and cation exchange. Analysis further showed that while TDS (total dissolved solids) in drainage water increased to 4.7-10.8 g/L (an average of 7.6 g/L) in period 2005-2010, that in 2003-2004 was 28% lower. In contrast to irrigation water, TDS in drainage was 6-18 times higher than that in irrigation water. Yet further analysis showed that while the increase in TDS in drainage water was mainly driven by farmland expansion, drainage water was as well affected by groundwater exploitation. It was therefore recommended to restrict farmland expansion and to intensify water-saving operations in order to prevent destructive declines in water flow to downstream ecosystems.
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影响因子：
1.6
作者：
N. Jayawardane;T. Biswas;J. Blackwell;F. Cook
通讯作者：
N. Jayawardane;T. Biswas;J. Blackwell;F. Cook
影响因子：
4.9
作者：
Xu Hailiang;Y. Mao;Song Yudong
通讯作者：
Xu Hailiang;Y. Mao;Song Yudong
DOI：
10.1061/(asce)0733-9437(2005)131:4(364
发表时间：
2005-08
期刊：
Journal of Irrigation and Drainage Engineering-asce
影响因子：
--
作者：
G. Sinai;P. Jain
通讯作者：
G. Sinai;P. Jain
DOI：
10.1007/s00254-005-1288-0
发表时间：
2005-07-01
期刊：
ENVIRONMENTAL GEOLOGY
影响因子：
--
作者：
Feng, Q;Liu, W;Xi, HY
通讯作者：
Xi, HY
影响因子：
3.5
作者：
Changchun Xu;Yaning Chen;Yapeng Chen;R. Zhao;Hui Ding
通讯作者：
Changchun Xu;Yaning Chen;Yapeng Chen;R. Zhao;Hui Ding