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Study on carrying capacity of the Mekong and bassac rivers related to different socio-economic scenarios serve catfish farming development

MONday - 08/09/2014 04:29
Environmental carrying capacity is a property and ability of the environment to regulate, adapt to a particular activity or velocity of an action that does not cause unacceptable effects. In this study, we use the integrated model MIKE 21/3 FM Coupled Model in combined with the hydraulic HydroGIS 3.0 model.
The models have been validated and servered to determine the environmental capacity in the large area - the system of Mekong river and Bassac river in the Mekong Delta. The paper presents the current carrying capacity of the Mekong river and Bassac river for catfish farming development based on the sources of wastewater discharge and receiving, thereby calculates the carrying capacity related to socio-economic development at 3 scenarios (high, medium and low). The study showed that the upstream was still capable of receiving high effluent of BOD, N-NO3 parameters, but limited to N-NH4 and P-PO4 parameters. This result was similar to the downstream of Bassac river, whereas downstream of Mekong river was still capability of receiving high effluent with almost parameters. Although capability of receiving in flood season higher than the dry season, due to the activities of agricultural drainage, wastewater adoption rate was lower compared with emission source. The results also mentioned no significant changes between high tide and low tide. The calculation of the current state of capacity to receive wastewater will serve as a basis for computing the catfish planning in the future.






Nguyen Hong Quan, Luu Duc Dien
Institute for Environment and Resources
Southern Monitoring Center for Aquaculture Environment and Epidemic, Research Institute for Aquaculture No2



















 

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