Answer Happy

2. . Floods are the most common type of disaster globally, responsible for almost half of all victims of natural disasters, with the economic losses of US$ 1.891 trillion. 244,000 of reported deaths and 4 billion injuries for the past 20 years. Malaysia has experienced a series of flood episodes since 1800s, that has affected approximately 29,720 km or 9 % of the total land areas. 4.9 million victims, and inflicted the economic damages of exceeding US$ 227.9 million per year. The 2014 food tragedy is recognized as the Tsunami-like disaster" in the history of Malaysia for the past 30 years, which had seriously inundated and devastated 18.000 km of the low-lying catchments along the Pahang River. Pahang River is the longest river in the Peninsular Malaysia, with the maximum length and breadth catchment of 459 and 236 km, respectively. It is one of the most important water resource for domestic water supply, fishing. agricultural and industrial activities and recreational purposes to the local community. A water sampling activity has been conducted at five (5) sampling sites soon after the tragedic flood event, which reasonably represent the 2 physicochemical qualities of the Pahang River Basin. The water quality of the Pahang River was assessed in the form Water Quality Index (WQI), under the standard Interim National Water Quality Standards (INWAS), consisting six (6) major parameters, notably pH, DO, BOD, COD, AN and TSS, as given in the table below. Calculate the WQI of each sampling point and mean Wol of the river water. Parameters Sampling Point S1 S2 pH 5.77 4.98 DO (mg/L) 3.13 4.48 Temperature (°C) 26.5 27.0 TOS (mg/L) 47.60 79.33 TSS (mg/L) 10.75 97.28 Turbidity (FTU) 55.31 189.93 COD (mg/L) 122.50 38.40 BODs (mg/L) 32.91 7.92 NOx (mg/L) 6.5 4.3 PO (mg/L) 0.43 0.79 NH3-N (mg/L) 0.89 2.31 SO2 (mg/L) 1.1 1.3 (10 marks)