在气候变化和土地管理实践下,加拿大大草原微型流域的排水,沉积物,有机碳和营养物质负载在气候变化和土地管理实践下
Yongbo Liu1, Nigel Van Nieuwenhuizen2, Jane Elliott3
1Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, Burlington, ON, Canada. Yongbo.Liu@ec.gc.ca.
Environmental monitoring and assessment
|October 9, 2023
概括
由于最佳管理实践 (BMP),农田的营养损失是最小的. 春季融雪对流水和污染物负载产生重大影响,这表明针对融雪的目标BMP是改善水质的最有效方法.
科学领域:
- 环境科学 环境科学
- 农业水文学 农业水文
- 水质管理水质管理
背景情况:
- 农业水下流域面临的挑战是排水和营养损失.
- 最佳管理实践 (BMP) 对于减轻环境影响至关重要.
- 了解水质的时空变化是有效管理的关键.
研究的目的:
- 分析斯蒂普勒地下水域流水和营养物质负载的时空模式.
- 评估现有的BMP在减少土壤和营养损失方面的有效性.
- 提供数据,以提高当前的BMP和开发新的BMP.
主要方法:
- 在曼尼托巴省斯蒂普勒水下流域进行了为期11年的实地监测研究.
- 在九个站点收集了关于流水,悬浮沉积物总量,碳,和的数据.
- 对收集的水质和水量数据进行了时空分析.
主要成果:
- 观察到营养损失较低,归因于多个BMPs.
- 确定了流水和水质参数的显著时空变化.
- 春季融雪占每年排水和污染物损失的很大一部分 (例如,81.2%的).
结论:
- BMPs有效地减少了研究区域的营养损失.
- 针对雪融排水的BMP是减少污染物负载比降雨更有效的.
- 这些发现将有助于优化BMP,以改善接收水体的水质.
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