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Groundwater plays a critical part in both natural and human existence. When surface water is scarce in arid climates, groundwater becomes an immensely valuable resource. Dak Lak is an area that frequently lacks water resources for everyday living and production, and the scarcity of water resources is exacerbated during the dry season. As a result, it is critical to do study and understand about groundwater to meet the region's water demand. This study aims to extend the use of the MODFLOW model for groundwater simulation and assess the overall groundwater reserves and water demand in the highland province Dak Lak.

The MODFLOW model is used in this work to compute and analyze the flow, prospective reserves of groundwater from which to plan extraction and estimate groundwater variation in the future.

The application of the MODFLOW model to Dak Lak province demonstrates that, despite limited data, particularly drilling hole data for subterranean water research, the model's calculation results have demonstrated its reliability and great potential for use in other similar places. The use of the model in conjunction with other data extraction modules is a useful input for creating underground flow module maps for various time periods. The large impact of recharge and evaporation on groundwater supplies and water balance in the research area is demonstrated by simulations of climate change scenarios RCP4.5 and RCP8.5.

None of the studies has been done previously to analyze water resources of Dak Lak and the scarcity of water resources is exacerbated during the dry season. Therefore, this study will provide useful insights in the water resource management and the conservation of Dak Lak. The groundwater in Dak Lak can meet the area's water demand, according to the results obtained and water balance in the study area. However, the management of water resources and rigorous monitoring of groundwater extraction activities in the area should receive more attention.

This study aims to investigate the concept of port service quality (PSQ) and examine its influence on customer satisfaction in the container port sector in Vietnam. Despite the importance of the maritime industry in which port is a critical sector in the national economy, there has been no research so far which examines what PSQ entails and how it affects customer satisfaction in the context of Vietnam.

Following a literature review, a conceptual model of PSQ and its influence on customer satisfaction was proposed. A survey questionnaire was then developed and piloted with senior executives who are working in various container shipping lines and logistics companies in Vietnam. The questionnaire was first designed in English and then refined through the process of translation and back-translation to ensure language non-discrepancies. The survey was administered to 200 members of Vietnam Shipowners’ Association, Vietnam Logistics Associations and Vietnam Shippers’ Council. By the cut-off date, 108 questionnaires were received, in which 99 valid replies were used for further analysis.

Results from this study reveal that PSQ is a construct of 4 factors and 16 items, and that enhanced PSQ will positively influence customer satisfaction, in which the outcomes of port service performance and its image would have the greatest impact. Interestingly, most items relating to social and environmental responsibility were dropped, and this result is expected in the context of a developing country like Vietnam.

Findings from this research may enhance port managers’ understanding on areas of PSQ to improve so as to meet and exceed their customers’ satisfaction.