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Updated: Jul 7, 2025

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在斜坡地块尺度下,在合流和分离的排水系统下的流水损失:一项比较研究
Lan Song1, Tianyang Li1, Binghui He1
1College of Resources and Environment, Southwest University, Chongqing, 400715, China.
Journal of environmental management
|December 21, 2023
概括
与分离系统或没有排水相比,汇流排水系统显著减少了斜坡农田的 (N) 流失. 这些系统有效地减轻营养损失,特别是总 (TN) 和颗粒 (PN).
科学领域:
- 农业工程 农业工程
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 排水系统对于管理从斜坡农田流出的营养流量至关重要.
- 汇合和分离的排水布局是常见的,但它们对营养损失的比较影响尚不清楚.
研究的目的:
- 研究汇合和分离的排水系统对斜坡地块中 (N) 流失的影响.
- 在不同的排水配置和斜坡梯度下比较营养损失特征 (总,溶解,颗粒).
主要方法:
- 实验室降雨模拟在赤裸的斜坡 (CK),汇流排水 (T1) 和分离排水 (T2) 系统上进行.
- 在1.8毫米/分钟的降雨强度下,以及5°,10°,15°的坡度下,分析了流水中的营养度和损失.
- 测量的主要参数包括总 (TN),溶 (DN),颗粒 (PN) 和DN:TN比率.
主要成果:
- 与赤裸斜坡 (CK) 和分歧排水 (T2) 相比,汇流排水 (T1) 显著降低了累积的流水深度,TN和PN损失.
- T1显示了在5°斜率下最低的溶 (DN) 度.
- 与T1相比,分离排水 (T2) 延迟了排水时间,但在减少总体N损失方面效果不佳.
结论:
- 排水系统有效地减少了从斜坡地块流出的营养流失.
- 与分离的排水系统相比,汇流排水系统在最大限度地减少流失方面表现出卓越的性能.
- 这些发现强调了选择适当的排水布局对于农业中有效的营养管理的重要性.
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