通过使用部分最小方程结构方程建模,确定中国西北干旱地区河流中营养度的主要因素
Weiwei Wang1, Fei Zhang2, Qi Zhao3
1College of Geography and Remote Sensing Sciences, Xinjiang University, Urumqi, 830017, China; Xinjiang Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, 830017, China.
Journal of environmental management
|May 28, 2023
概括
干旱绿洲河流中的营养污染是由土地使用,天气和土壤驱动的. 了解流域缓冲区中的这些因素对于管理水质和防止灌农业区的肥沃化至关重要.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 农业科学 农业科学
背景情况:
- 干旱绿洲河流的营养对识别水污染源和保护水资源至关重要.
- 干旱地区的灌农业对水质管理提出了独特的挑战.
研究的目的:
- 确定干旱农业流域内的绿洲河流中总 (TP) 和总 (TN) 的主要驱动因素.
- 量化环境变量和营养度之间的关系,以告知水资源管理.
主要方法:
- 使用冗余分析 (RDA) 和部分最小平方结构方程建模 (PLS-SEM).
- 分析了来自中国西北部凯都河流域27个分流域的数据.
- 解释变量包括地形,土壤,气象元素和土地使用类型.
主要成果:
- 在采样点之间观察到TP和TN度的显著差异.
- 水域缓冲区对营养物质变异的解释能力最高.
- 土地使用类型,气象因素和土壤被确定为TP和TN变化的主要驱动因素,解释了超过94%的总影响.
结论:
- 捕捞缓冲区是理解和管理干旱农业景观中的河流营养的关键区域.
- 这些发现为减轻干旱绿洲河流水污染和肥沃化提供了科学基础.
- 有效的河流营养物质管理战略应优先考虑土地利用,气象因素和土壤因素.
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