The effect of high tides on Sungai Damansara using Infowork RS

Abstract

Tides are the cyclic rising and falling of the earth ocean surface. Tides are caused by the gravitational pull of the moon and the sun on the earth and its water. The moon has a stronger effect than the sun because the moon is closer to earth. Damansara catchments is located at west of Kuala Lumpur. Rapid development within the catchments has been on going over the years. Damansara area is an industrial and commercial area. Sungai Damansara is a tributary of Sungai Klang. Sungai Damansara catchment has an area of approximately 148 km2 which comprises the six major tributaries. There are Sungai Pelemas, Sungai Pelumut, Sungai Payong, Sungai Rumput, Sungai Air Kuning and Sungai Kayu Ara. Many flood occurred in this catchment area but the worst flood occurred on 26th February 2006. Model calibration has been carried out at Taman Sri Muda water level station. Manning coefficient, n = 0.03 is suitable value roughness coefficient. This model was developed by using high and low flow as an input with different Return Period. This study was conducted to investigate the limit of tide during high tide and low tide. The results from the hydrodynamic modeling had indicated that the tidal effect can be seen clearly up to Section 22. From this point up to Kampung Melayu Kebun Bunga, a very small tidal variation was observed. Finally the tidal diminish at somewhere at TTDI Jaya which can be concluded that this is the limit of tides.