Sediment Transport In Sungai Kulim, Kedah [TC513.M32 C456 2007 f rb].

Kesan pembangunan yang mendadak telah membawa impak kepada hidrologi dan geomorfologi sesuatu kawasan tadahan. Pembangunan yang mendadak ini terutamanya di kawasan tadahan sungai akan meningkatkan hasil endapan dan seterusnya bukan sahaja menjejaskan morfologi sungai, kestabilan sungai dan mengakibatkan kerosakan yang serius pada struktur hidraulik sepanjang saluran sungai yang menyebabkan banjir di kawasan bandar. Effect of rapid urbanization has accelerated the impact on the catchment hydrology and geomorphology. Such rapid development which takes place in river catchment areas will result in higher sediment yield and it will not only affects river morphology, but also river channel stability, causing serious damages to hydraulic structures along the river and also becoming the main cause for serious flooding in urban areas

Simulation Of Flood Inundation Map Associated With Sediment Transport For Sungai Pahang

Flood disasters are a major cause of fatalities and economic losses. Several studies indicate that global flood risk is currently increasing. Rapid urbanisation has accelerated impact on the catchment hydrology and geomorphology. When landuse and land cover change as a result of development or human activities, such as logging which takes place in river catchment areas, a dramatic increase in the surface runoff and higher sediment yield are expected. The present study can be divided into four (4) main parts. The first part is to carry out trend analysis using Mann-Kendall test for the annual rainfall time series data. The results demonstrate that increasing trends were detected for eleven (11) rainfall stations while four (4) stations showing decreasing trends in Sungai Pahang river basin. The second part attempts to give an overview of the channel changes and sediment transport phenomena in Sungai Pahang including bed material movement from the upstream of Sungai Pahang to the river mouth at Pekan. River geometry survey associated with the spatial variation in sediment transport has confirmed that changes in river bed profile occurred due to erosion or deposition along Sungai Pahang. The sediment distribution size for Sungai Pahang was found to be made up of very coarse sand and gravel after December 2014 flood. A rainfall-runoff model is developed and implemented for Sungai Pahang river basin. Performance evaluation of the InfoWorks PDM model was moderately successful in reproducing 2003 and 2012 to 2014 hydrographs covering both low and high flow, which have been the emphasis of the third part of this research. The fourth part is intended to deal with flood simulation using InfoWorks RS with the consideration of sediment transport modeling. The flood inundated area has been estimated based on the input design hydrograph of the 100-year annual recurrent interval and storm duration of 8 days. Peak water surface and channel bed changes for Sungai Pahang indicated that the maximum flood level with and without sediment transport modeling has a difference of at least 0.30m. The flooded area was identified to increase by 306.84km² (30.21%) from the simulations results without sediment transport compared to flood simulations with sediment transport. As a result, the current study shows that it is essential to take into account the sediment movement along the river channel for the prediction of flood inundation areas in order to produce digital flood maps

Sediment transport in Sungai Kulim, Kedah

Effect of rapid urbanization has accelerated the impact on the catchment hydrology and geomorphology. Such rapid development which takes place in river catchment areas will result in higher sediment yield and it will not only affects river morphology, but also river channel stability, causing serious damages to hydraulic structures along the river and also becoming the main cause for serious flooding in urban areas. Therefore, it is necessary to predict and evaluate the river channel stability due to the existing and future developments. This study was carried out at Sungai Kulim in Kedah state, Malaysia, by means of evaluation on sediment transport using recently observed data up to year 2006. The present study attempts to give an overview of the channel changes and sediment transport phenomena in Sungai Kulim. A total of 24 samples of bed materials were collected from four locations (Cl-l 20000, eH 14390, eH 3014 and eH O), and 14 river hydraulics and sediment transport data sets including discharge, bed load, suspended load and total load were collected from two locations (Cl-i 14390 and eH 3014) from 2004 to 2006. The data were used to analyze and evaluate existing Manning equations and sediment transport equations. Attempts were also made to derive new Manning equations (Equations 4.3 and 4.4) with a correlation coefficient, R2 = 0.86 for application to the moderate-size channels in Malaysia. The results of evaluation for total load equations at the two locations along Sungai Kulim show that Engelund & Hansen equation gave the best prediction for sand bed stream and yielded highest percentage of data with discrepancy ratio in between 0.5 and 2.0 (33.33% at eH 14390 and 62.50% at eH 3014). An erodible-boundary model, FLUVIAL-12 which simulates inter-related changes in channel-bed profile, width variation and changes in bed topography was selected for this study

Sediment Transport In Sungai Kulim, Kedah

Effect of rapid urbanization has accelerated the impact on the catchment hydrology and geomorphology. Such rapid development which takes place in river catchment areas will result in higher sediment yield and it will not only affects river morphology, but also river channel stability, causing serious damages to hydraulic structures along the river and also becoming the main cause for serious flooding in urban areas. Therefore, it is necessary to predict and evaluate the river channel stability due to the existing and future developments. This study was carried out at Sungai Kulim in Kedah state, Malaysia, by means of evaluation on sediment transport using recently observed data up to year 2006. The present study attempts to give an overview of the channel changes and sediment transport phenomena in Sungai Kulim. A total of 24 samples of bed materials were collected from four locations (CH 20000, eH 14390, eH 3014 and eH O), and 14 river hydraulics and sediment transport data sets including discharge, bed load, suspended load and total load were collected from two locations (eH 14390 and eH 3014) from 2004 to 2006. The data were used to analyze and evaluate existing Manning equations and sediment transport equations. Attempts were also made to derive new Manning equations (Equations 4.3 and 4.4) with a correlation coefficient, R2 = 0.86 for application to the moderate-size channels in Malaysia. The results of evaluation for total load equations at the two locations along Sungai Kulim show that Engelund & Hansen equation gave the best prediction for sand bed stream and yielded highest percentage of data with discrepancy ratio in between 0.5 and 2.0 (33.33% at CH 14390 and 62.50% at eH 3014). An erodible-boundary model, FLUVIAL-12 which simulates inter-related changes in channel-bed profile, width variation and changes in bed topography was selected for this study. EngelundHansen equation and roughness coefficient, n = 0.030 were selected for the model which was calibrated and validated for water surface profile and bed elevation

Flood Inundation Analysis Using HEC-6 And Arcview GIS 3.2a

An integration procedure namely AVHEC6.avx has been created between Arc View GIS 3.2a and HEC-6 hydraulic model to perform flood inundation analysis. The procedure was tested using hydraulic and hydrological data for Pari River channel and floodplain with the reach approximately 4 km long