Stream discharge characteristics through urbanization gradient in Danshui River, Taiwan

Perspectives from observation and simulation

Jr Chuan Huang, Chun Chiang Lin, Shih-Chien Chan, Tsung Yu Lee, Shih Chieh Hsu, Cheing Tung Lee, Jiun Chuan Lin

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Urbanization and the subsequent changes in land use/cover inevitably influence the quality and even the quantity of stream water. This issue is widely studied through evaluations on land-use change scenarios or comparisons among historical patterns at the same watershed. However, observational stream discharge changes through urbanization gradient have rarely been discussed. In this study, we analyzed 5- year discharge data from 13 gauges in the Danshui River network with a wide range of urbanization gradient to explore the impacts on observational hydrological characteristics in individual catchments. The results reveal that stream discharge in pristine watersheds is characterized by a larger proportion of baseflow and is less fluctuating. When the forest coverage is <90%, the discharge fluctuation almost doubles. Meanwhile, the baseflow fraction decreases gradually with the increase of paddy area, which may concomitantly result from the increasing irrigation. Such a drop in baseflow may threaten the maintenance of the minimum flow required for the stream aquatic ecosystem. Furthermore, we simulated the stream discharges by TOPMODEL with blind landuse- independent parameters. The results show that the simulated discharges are satisfactory, particularly for the pristine catchments, but not as fitting for the paddy-intensive watersheds perhaps due to the unexpected irrigation. On the whole, the calibrated parameters are dependent with the landscape characteristics. The landscape-based parameter estimations can be applied to simulate discharge well, meaning the potential to assess the ungauged watersheds.

Original languageEnglish
Pages (from-to)5689-5703
Number of pages15
JournalEnvironmental Monitoring and Assessment
Volume184
Issue number9
DOIs
Publication statusPublished - 2012 Sep 1

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Watersheds
Discharge (fluid mechanics)
urbanization
Rivers
Irrigation
river
Land use
Catchments
baseflow
simulation
watershed
Aquatic ecosystems
Parameter estimation
Gages
irrigation
catchment
aquatic ecosystem
land use change
gauge
Water

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Pollution
  • Management, Monitoring, Policy and Law

Cite this

Huang, Jr Chuan ; Lin, Chun Chiang ; Chan, Shih-Chien ; Lee, Tsung Yu ; Hsu, Shih Chieh ; Lee, Cheing Tung ; Lin, Jiun Chuan. / Stream discharge characteristics through urbanization gradient in Danshui River, Taiwan : Perspectives from observation and simulation. In: Environmental Monitoring and Assessment. 2012 ; Vol. 184, No. 9. pp. 5689-5703.
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Stream discharge characteristics through urbanization gradient in Danshui River, Taiwan : Perspectives from observation and simulation. / Huang, Jr Chuan; Lin, Chun Chiang; Chan, Shih-Chien; Lee, Tsung Yu; Hsu, Shih Chieh; Lee, Cheing Tung; Lin, Jiun Chuan.

In: Environmental Monitoring and Assessment, Vol. 184, No. 9, 01.09.2012, p. 5689-5703.

Research output: Contribution to journalArticle

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