Finding potential sites for resilient prawn production in the tropical environment that also prevents wastage of natural resources is not an easy task. The purpose of this study is to evaluate water quality suitability for prawn farming in Negeri Sembilan of Peninsular Malaysia based on Geographic Information System (GIS). To achieve this goal, numerous criteria including sources of water, water temperature, water pH, sources of pollution, salinity, soil texture and availability of phytoplankton criteria were considered for the modelling process. Analytic Hierarchy Process (AHP) technique was performed to standardize the criteria and the weighting process. The weighted overlay of indicators and results were accomplished by applying the Multi-Criteria Decision Analysis (MCDA) method in GIS. It was indicated that the Negeri Sembilan area has potential for prawn farming. The results showed that about 25 per cent (163 056.93 ha) of the area was most suitable for prawn farming, about 58 per cent (384 656.88 ha) was considered moderately suitable, while 18 per cent (117 633.49 ha) was regarded as least suitable. The study concluded that the multi-criteria decision analysis of water quality for prawn farming is vital for regional economic planning in the Negeri Sembilan area and also significant when establishing a model for aquaculture development.
Morphmetric analysis was conducted for River Taraba Catchments Area in Taraba with an emphasis on its hydrological response to storm events using geospatial techniques. The Study Basin comprises of nine small watersheds. The drainage network is dendritic. RTCA is a 7 th order drainage basin, with an area of 15777 km 2 , having a perimeter of about 959km.The Lo value registered was 1.64 km .This denote gentle slope and stretch paths network on the watershed. The mean Rb varies between 3.0 and 5.14 for the catchment, indicating a transitional zone of geological structure with a less remarkable influence of structural disturbances. Value of drainage density indicates moderate runoff potentials. This depicts geological structures which do not distort the drainage pattern as such. The Basin have long Lb, of 242 km .This is an indicative of low flooding susceptibility. The elongated the basin length, the little the effect on the extent to which the surface runoff manipulate the basin and been lowered by agents of denudation. Catchment characterizations of the study area and basin morphometry do not typify high flooding susceptibility. Environmental degradation through proliferation of haphazard and uncontrolled development within and around the flood plain seems the cause of incessant flooding in the catchments. Hazards occur when people place themeselves in the path of geophysical and climatological agents. Governments should discourage influx to buffer and exploitation of the drainage basin in the study area.
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