福建白眉水库保护区水质风险动态分析

IF 4.2 2区环境科学与生态学 Q1 ECOLOGY

Ecosystem Health and Sustainability Pub Date : 2023-01-01 DOI:10.34133/ehs.0003

Yunzhu Tao, Angshuo Zhan, Zhifang Wang, W. Fan, Yanjuan Yao, Siqi Yang, Tongjian Kang

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引用次数: 1

摘要

饮用水资源的安全是关系到人类生存的重要问题。从时空角度广泛利用地理信息系统和遥感数据进行水质风险评估，可以补充水资源管理。本研究以福建省白梅水库保护区为研究对象。利用水土评价工具模拟水文过程，采用定量反演叶面积指数来表征植被生长状况。模拟结果表明，水质风险的空间分布主要与土地利用状况有关，时间分布主要与降水动态有关。不同情景的单因素分析结果表明，不受控制的农用地扩张(情景A)将导致流域总氮(TN)负荷总体平均增加231.9%。相比之下，如果农业用地全部转化为森林(情景B)，则流域总全氮负荷将平均减少20.8%。实际上，将坡耕地转为森林(情景C)可使总全氮负荷减少17.0%。因此，适度退耕还林可以有效地减少污染负荷。调整施肥时间和施肥量的模拟结果表明，与无雨日相比，雨天施肥对水质的危害更大。该方法可应用于保水区水质风险评价的动态分析，为推进区域尺度的生态治理战略和可持续发展提供科学参考。

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Dynamic Analysis of Risk to Water Quality in the Baimei Reservoir Conservation Area, Fujian Province, China

The security of drinking water resources is an important concern for human survival. The extensive use of geographic information system and remote sensing data in risk assessments of water quality from a spatiotemporal perspective can complement water resource management. In this study, we investigated Baimei reservoir conservation area, Fujian Province, China. The quantitatively inversed leaf area index was used to represent the vegetation growth condition in simulations of the hydrological process using soil and water assessment tool. According to the simulation results, the spatial distribution of the risk to water quality was mainly related to the land-use condition, and the temporal distribution of the risk to water quality was mainly related to the precipitation dynamics. Single factor analysis of various scenarios showed that uncontrolled expansion of agricultural land (scenario A) would lead to an overall average increase of 231.9% in the total nitrogen (TN) load in the basin. By contrast, if agricultural lands are all transformed into forests (scenario B), then the overall TN load in the basin would decrease by an average of 20.8%. In practical terms, conversion of sloping agricultural lands to forests (scenario C) could reduce the overall TN load by 17.0%. Thus, moderate conversion of agricultural lands to forests can reduce the pollution load effectively. The simulation results obtained for scenarios with adjustments to the fertilization time and amount showed that applying fertilizer on rainy days would increase the risk to water quality compared with days without rain. The method developed in this study can be applied for dynamic analysis in water quality risk assessments of water conservation areas and can provide a scientific reference for promoting ecological management strategies and sustainable development at the regional scale.

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来源期刊

Ecosystem Health and Sustainability Environmental Science-Management, Monitoring, Policy and Law

CiteScore

7.10

自引率

2.00%

发文量

审稿时长

22 weeks

期刊介绍： Ecosystem Health and Sustainability publishes articles on advances in ecology and sustainability science, how global environmental change affects ecosystem health, how changes in human activities affect ecosystem conditions, and system-based approaches for applying ecological science in decision-making to promote sustainable development. Papers focus on applying ecological theory, principles, and concepts to support sustainable development, especially in regions undergoing rapid environmental change. Papers on multi-scale, integrative, and interdisciplinary studies, and on international collaborations between scientists from industrialized and industrializing countries are especially welcome. Suitable topics for EHS include: • Global, regional and local studies of international significance • Impact of global or regional environmental change on natural ecosystems • Interdisciplinary research involving integration of natural, social, and behavioral sciences • Science and policy that promote the use of ecological sciences in decision making • Novel or multidisciplinary approaches for solving complex ecological problems • Multi-scale and long-term observations of ecosystem evolution • Development of novel systems approaches or modeling and simulation techniques • Rapid responses to emerging ecological issues.