A river health status model based on water quality, macroinvertebrates and land use for niyugan river, Cabuyao City, Laguna, Philippines

Issue Date

12-2016

Abstract

A health status model was developed for Niyugan River. It consists of two component parameters: response and pressure. The response parameters, water quality and Ephemeroptera-Plecoptera-Trichoptera (EPT) proportion measure the current state of the river. Pressure parameters, land use, infrastructure, and riparian vegetation proportion represent the factors that can worsen the current river condition. Water quality indicator values were determined using on-site measurements and analyzed water. Benthic macroinvertebrates were collected from all the sampling sites. Land use, infrastructure, and riparian vegetation proportions were derived from a map created using Arcmap10. For efficient parameter input and sensitivity analysis, a calculator-like interface was developed using Stella. The score resulted to 37.07, corresponding to a “poor” health. Sensitivity analyses showed that the health score is influenced at a greater extent, by the combination of water quality indicators rather than the number of water quality indicators in the model and by the magnitude of separate indicators within a parameter category. It is suggested that the model is evaluated using data sets from other rivers to further investigate its sensitivity. This model can serve as a basis for developing more dynamic river health models for the Philippines.

Source or Periodical Title

Journal of Environmental Science and Management

ISSN

0119-1144

Volume

19

Issue

2

Page

38-53

Document Type

Article

Physical Description

maps, illustrations, tables, graphs

Language

English

Subject

EPT richness, Land use, Model, Niyugan river, River health, Stella, Water quality

Digital Copy

yes

Link to Full Text

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