Exploring Homogeneity among Catchments forEfficient Province-wide Watershed Managementin Negros Occidental, Philippines

IF 0.4 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Journal of Environmental Science and Management Pub Date : 2022-06-30 DOI:10.47125/jesam/2022_1/03
Ana Rosa Carmona, V. Ella
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引用次数: 1

Abstract

Catchment classification is one approach in natural resource management that is widely adopted in taking efficient steps towards implementing suitable soil and water conservation measures across a basin or region. Catchments have unique characteristics emerging from the heterogeneity and complexity of the systems and classifying them paves way to achieve order and simplicity. However, some constraints related to data availability could be a problem in a region where only few rivers are gauged and with only one type of climate data available. This study presents a way to decrease complexity by grouping these catchments based on their biophysical characteristics extracted from readily available datasets and using simple statistical approaches. Principal component analysis was first conducted to twenty-four biophysical variables which were reduced to eight factor components. A hierarchical clustering method was then performed to define the number of clusters and K-means clustering procedure was followed for the final grouping. Nine watershed clusters were formed with watershed size having the greatest contribution. Grouping catchments into clusters with similar biophysical characteristics does not only promote simplicity but also facilitates understanding of the nature of not only one watershed but also its relationship with other watersheds in a bigger landscape. The study also confirmed that spatially close watersheds exhibit similar characteristics.
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探索集水区的同质性:菲律宾西内格罗斯省有效的流域管理
集水区分类是自然资源管理中的一种方法,在采取有效措施在整个流域或地区实施适当的水土保持措施时被广泛采用。集水区具有独特的特征,这些特征源于系统的异质性和复杂性,对其进行分类为实现有序和简单铺平了道路。然而,在一个只有很少河流被测量并且只有一种类型的气候数据可用的地区,与数据可用性相关的一些限制可能是一个问题。这项研究提出了一种降低复杂性的方法,即根据从现成数据集中提取的生物物理特征,并使用简单的统计方法对这些集水区进行分组。首先对24个生物物理变量进行了主成分分析,这些变量被简化为8个因子成分。然后执行分层聚类方法来定义聚类的数量,并遵循K-means聚类程序进行最终分组。形成了9个流域集群,其中流域规模的贡献最大。将集水区分组为具有类似生物物理特征的集群不仅有助于简化,而且有助于了解一个流域的性质,以及它与更大景观中其他流域的关系。该研究还证实,空间较近的流域也表现出类似的特征。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
10
审稿时长
2 months
期刊介绍: The Journal of Environmental Science and Management (JESAM) is an international scientific journal produced semi-annually by the University of the Philippines Los Baños (UPLB). JESAM gives particular premium to manuscript submissions that employ integrated methods resulting to analyses that provide new insights in environmental science, particularly in the areas of: environmental planning and management; protected areas development, planning, and management; community-based resources management; environmental chemistry and toxicology; environmental restoration; social theory and environment; and environmental security and management.
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