Abstract
River regulation is a process of alteration of stream flow for water resources and hydropower. Most regulation structures involved dams and weirs which are able to control the flow regimes for special requirements, i.e., agriculture, domestic and industrial power. This study examines channel geometry change in particular their planform characteristic due to intensive regulation by the Pangson and Semenyih reservoirs on the Langat river over the last 12 years. GIS-ArcInfo extrapolation analysis was used to quantify the geometry change. Superimposed topographical maps of pre (1973) and post regulated (1985) were successful to determined type and pattern of channel planform change. Examination of planform indices represented by three-point stations in the upland, intermediate and lowland reaches indicate that in general, channel sections tend to be straighter in the upland and become narrower with more meandering in the intermediate and lowland reach sections. These were proven quantitatively using Sinuosity Index (SINDX). In the upland reach, the SINDX was reduced to average 1.02-0.99 post-regulation while the others demonstrate the opposite trend.
| Original language | English |
|---|---|
| Pages (from-to) | 423-427 |
| Number of pages | 5 |
| Journal | Journal of Engineering and Applied Sciences |
| Volume | 6 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2011 |
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Keywords
- Channel geometry
- GIS
- Langat river
- Planform
- Reservoirsr
- Sinuosity index
ASJC Scopus subject areas
- Engineering(all)
Cite this
River regulation and its impact on river channel planform changes. / Toriman, Mohd. Ekhwan; Er, Ah Choy; Mokhtar, Mazlin; Elfithri, Rahmah; Gasim, Muhammad Barzani; A. Karim, Othman; Jaafar, Mokhtar; Aziz, Nor Azlina Abdul; Jamil, Nor Rohaizah.
In: Journal of Engineering and Applied Sciences, Vol. 6, No. 6, 2011, p. 423-427.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - River regulation and its impact on river channel planform changes
AU - Toriman, Mohd. Ekhwan
AU - Er, Ah Choy
AU - Mokhtar, Mazlin
AU - Elfithri, Rahmah
AU - Gasim, Muhammad Barzani
AU - A. Karim, Othman
AU - Jaafar, Mokhtar
AU - Aziz, Nor Azlina Abdul
AU - Jamil, Nor Rohaizah
PY - 2011
Y1 - 2011
N2 - River regulation is a process of alteration of stream flow for water resources and hydropower. Most regulation structures involved dams and weirs which are able to control the flow regimes for special requirements, i.e., agriculture, domestic and industrial power. This study examines channel geometry change in particular their planform characteristic due to intensive regulation by the Pangson and Semenyih reservoirs on the Langat river over the last 12 years. GIS-ArcInfo extrapolation analysis was used to quantify the geometry change. Superimposed topographical maps of pre (1973) and post regulated (1985) were successful to determined type and pattern of channel planform change. Examination of planform indices represented by three-point stations in the upland, intermediate and lowland reaches indicate that in general, channel sections tend to be straighter in the upland and become narrower with more meandering in the intermediate and lowland reach sections. These were proven quantitatively using Sinuosity Index (SINDX). In the upland reach, the SINDX was reduced to average 1.02-0.99 post-regulation while the others demonstrate the opposite trend.
AB - River regulation is a process of alteration of stream flow for water resources and hydropower. Most regulation structures involved dams and weirs which are able to control the flow regimes for special requirements, i.e., agriculture, domestic and industrial power. This study examines channel geometry change in particular their planform characteristic due to intensive regulation by the Pangson and Semenyih reservoirs on the Langat river over the last 12 years. GIS-ArcInfo extrapolation analysis was used to quantify the geometry change. Superimposed topographical maps of pre (1973) and post regulated (1985) were successful to determined type and pattern of channel planform change. Examination of planform indices represented by three-point stations in the upland, intermediate and lowland reaches indicate that in general, channel sections tend to be straighter in the upland and become narrower with more meandering in the intermediate and lowland reach sections. These were proven quantitatively using Sinuosity Index (SINDX). In the upland reach, the SINDX was reduced to average 1.02-0.99 post-regulation while the others demonstrate the opposite trend.
KW - Channel geometry
KW - GIS
KW - Langat river
KW - Planform
KW - Reservoirsr
KW - Sinuosity index
UR - http://www.scopus.com/inward/record.url?scp=80055052924&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80055052924&partnerID=8YFLogxK
U2 - 10.3923/jeasci.2011.423.427
DO - 10.3923/jeasci.2011.423.427
M3 - Article
VL - 6
SP - 423
EP - 427
JO - Journal of Engineering and Applied Sciences
JF - Journal of Engineering and Applied Sciences
SN - 1816-949X
IS - 6
ER -