Land use changes in urbanization, industrialization, and agricultural processes will continue to have negative impacts on water quality at all scales. The impact of land use changes on water quality is generally studied by analyzing the relationships between land use and water quality indicators. Therefore, the purpose of this research was to review and analyze the main relationships between land use and water quality, as well as to visualize the major sources and processes of water quality pollution in Malaysia. To achieve our goal, we evaluated the significance of both land use and water quality attributes used in the past studies and correlated them to understand their relationship from another angle of view. The results revealed that 87% of the reviewed studies indicated urban land use as a major source of water pollution, while 82% indicated agricultural land use, 77% indicated forest land use, and 44% indicated other land uses. However, the results of correlation analysis showed that agricultural and forest-related activities more affected water quality through their significant positive correlation with physical and chemical indicators of water quality, while urban development activities had a greater impact on water quality through altering hydrological processes such as runoff and erosion. These findings would provide decision-makers with useful information for managing water pollution processes rather than sources only.

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Problem statement: A sediment analysis study was conducted at the Chini River on 16 and 31 August 2008. This study was conducted to review the formation of suspended sediment load in the Lake Chini catchment area, which flows into the Pahang River via the Chini River. Approach: Three sampling stations were chosen, the first one at upstream Chini River (S1), mid-stream Chini River (S2) and downstream Chini River (S3). Three parameters were quantified for this study, namely: distribution of sediment grain size (g), concentration of suspended sediment (mg L^-1) and river discharge values (in m³ sec^-1). Results: The findings of the study show that the sizes of sediment fall between phi Ø-1.00 and phi Ø-2.00 with very rough particle sizes falling between phi-1.00 and phi 0.00. At the study area, the daily discharge value is estimated at 722, 304, 00 L day^-1. The average suspended sediment concentration recorded for each station shows varying values for both timelines. The values were 27.33 mg L^-1 on 16/08/08 and 2.233 mg L^-1 on 31/08/08. Conclusion: The average value for all stations calculated based on the formation of suspended sediment load per day falls between 16,480.4627 kg day^-1 on 16/08/08 and 1,540.43 kg day^-1 on 31/08/08. Overall, when this number was extrapolated to every square kilometre, the result showed that the estimated average sediment that flows out of Lake Chini is 73.22 tonnes km^-2 year^-1

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