Impact of land-use changes toward base-flow regime in Lui and Langat Dengkil sub-basin

Hai Hwee Yang, Othman Jaafar, Ahmed El-Shafie, Sharifah Mastura Syed Abdullah

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Lui River and Langat-Dengkil River sub-basin are one of the large portions of Langat River catchment, known as the prime and important water source for Kuala Lumpur, Petaling Jaya, Shah Alam, Klang as well as domestic and industries usage in the Langat River basin itself. Unfortunately, the land-use change has greatly impacted the base-flow regimes particularly for the upstream area of Lui River subbasin and downstream area of Langat-Dengkil River sub-basin. Base-flow separation method based on United Kingdom Institute of Hydrology (UKIH) smoothed minima method was adopted to estimate baseflow from daily stream-flow data. An index namely, base-flow index (BFI) is used to give the ratio of volume of base-flow (VB) to the total stream-flow (VA). The graph of yearly BFI time series has exhibited the unchanged or constant trends in Lui River sub-basin ranging from 0.3625 to 0.7184. In fact, downward trend in Langat-Dengkil River Sub-basin has vigorous fluctuation ranging from 0.2465 to 0.7356.The comparison of BFI in dry and wet period for both Lui and Langat-Dengkil River sub-basin was carried out for certain years (6 years for both cases for certain reasons) to identify the quantity of river's runoff derived from the stored sources particularly in dry period to sustain continuous flowing of water in the river. In order to analysis the low-flow regimes, technique 7-day 1-years (7Q1) was used for both Lui and Langat-Dengkil Sub-basin. The 7Q1 help to provide information of availability of water supply as well as robustness of the system particularly in drought period for both Sub-basins over the time.

Original languageEnglish
Pages (from-to)4960-4976
Number of pages17
JournalInternational Journal of Physical Sciences
Volume6
Issue number21
Publication statusPublished - 30 Sep 2011

Fingerprint

base flow
land use
Land use
Catchments
rivers
Rivers
Stream flow
water
trends
hydrology
river basins
drought
flow separation
United Kingdom
Water
Flow separation
Hydrology
Drought
drainage
upstream

Keywords

  • Base-flow index
  • Base-flow separation
  • Langat-Dengkil River
  • Low-flow
  • Lui River
  • United Kingdom Institute of Hydrology

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Electronic, Optical and Magnetic Materials

Cite this

Impact of land-use changes toward base-flow regime in Lui and Langat Dengkil sub-basin. / Yang, Hai Hwee; Jaafar, Othman; El-Shafie, Ahmed; Syed Abdullah, Sharifah Mastura.

In: International Journal of Physical Sciences, Vol. 6, No. 21, 30.09.2011, p. 4960-4976.

Research output: Contribution to journalArticle

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