Spatial variation impact of landscape patterns and land use on water quality across an urbanized watershed in Bentong, Malaysia
Spatial variation impact of landscape patterns and land use on water quality across an urbanized watershed in Bentong, Malaysia
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DOI：
10.1016/j.ecolind.2020.107254
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发表时间：
2021-03
影响因子：
6.9
通讯作者：
Zakariya Nafi' Shehab;N. Jamil;A. Aris;Nur Syuhadah Shafie
中科院分区：
文献类型：
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作者：
Zakariya Nafi' Shehab;N. Jamil;A. Aris;Nur Syuhadah Shafie
景观格局和土地覆盖变化严重影响污染物的水文循环，并显着影响受纳水质。了解空间分布和分配水污染源是实施有效水资源管理实践的重要因素。本研究旨在量化和说明土地利用和景观配置对马来西亚文冬河水质的影响。该研究在 2018 年正常和雨季期间对 22 个地点进行了采样。使用 FRAGSTATS 分析景观指标的空间变化。结果表明，水质与景观配置和土地覆盖比例密切相关。它还表明，随着不同土地利用的高度分散，水的退化敏感性增加。景观指标表明，城市和农业用地的边缘和斑块密度比例较高与水质恶化有关，如果森林不被破坏，水质可能会更好。因子分析表明河流遭受了营养盐和有机物污染。总体而言，结果推断热带森林对于保持水清洁至关重要。因此，热带森林可以被认为是水质的良好指标，并且可以减轻人类活动对生态系统服务的影响。文冬河沿岸对缓冲区的过度需求是非常明显的，因为它们可以通过过滤沉积物、养分和最大限度地减少降雨量变化来提供服务。可以想象，维持水的连通性、避免土地利用的紧凑性、控制未利用土地的比例以及保持完整的森林分布可以改善水质并减少污染物的排放。
Landscape patterns and land cover changes critically impact the hydrological cycling of pollutants and affect receiving water quality significantly. Understanding spatial distribution and allocating water pollution sources are vital elements in implementing effective water resource management practices. This research aimed to quantify and illustrate the effects of land use and landscape configuration on water quality in Bentong River, Malaysia. The study sampled 22 sites during the normal and wet season in 2018. FRAGSTATS was used to analyze the spatial change of landscape metrics. Results showed that water quality was closely associated with landscape configurations and land cover proportions. It also indicated that water’s susceptibility to degradation increased with high interspersion of different land uses. Landscape metrics showed that high proportions of edge and patch density for urban and agricultural lands were associated with water quality deterioration, and that water quality could have been better if forests were unfragmented. Factor analysis implied that the river suffered nutrient and organic pollution. Overall, the results inferred that tropical forest was vital in keeping water clean. Consequently, tropical forest can be considered a good indicator of water quality, and can lessen the effects of human practices on ecosystem services. The excessive need for buffer zones along Bentong river was quite evident, as they can provide services by filtering sediment, nutrients and minimizing rainfall variability. It is conceivable that sustaining water connectivity, avoiding land use compactness, controlling unused land proportion and maintaining a prevalent distribution of unfragmented forest can enhance water quality and reduce pollutants’ release.