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This article aims to describe the importance of ergonomics implementation for the sustainability of groundwater conservation programs. Ergonomics concept has been applied in research on groundwater conservation in Denpasar City, Bali, Indonesia (2013-2018, started from problem identification, data collection to engineering groundwater conservation programs through rainwater harvesting wells. In each stage of research, the application of ergonomics was more focused on human activities. In identifying problems, involving all relevant elements to obtain various inputs including constraints and limitations of existing potential; in the data collection process was more focused on the convenience, safety, and health of data takers; and in engineering groundwater conservation programs more focused on the community, Industry, or government as users of the programs. Through this ergonomics application, it is expected that all related elements are motivated to participate actively, increases sense of belonging, so that the groundwater conservation program can be sustainable.

This research was conducted to assess the effectiveness on Domestic Recharge Wells that named (SPAHUDO). It’s designed as one of the output of long-term research (2013-2025) on the Model of Groundwater Conservation Program through Ergo-Hydrogeology approach. It synergized the hydrogeology approach, which is more focuses on the technical data of hydrogeology and geotechnical, while ergonomic approach is focuses on human aspect included in the research process, design, and product. The technical assessment of the effectiveness of SPAHUDO was conducted by using the basic formula of both hydrology and geotechnical, confirmed by user based ergonomic approach. The synergized between technically and human aspect is very important for sustainability of the implementation of SPAHUDO.

Natural slope that are formed from the soil often experience landslides. Landslide occurs because the driving force received by the slope is greater than the ability of the slope to resist it. Thus forming a sliding plane that has a low stability. Factors that decrease the stability of the slope are infiltration of rainwater, vibrations that may come from earthquakes or moving loads, construction loads, and cracks. Rainwater that infiltrate through slope causes active force on the slopes and also decreases soil strength. Landslides due to infiltration of rainfall are common problems on residual soil slopes from the tropical region. Soil stabilization process for soil that have been experienced prior landslide, often encounter difficulty in compacting soil to form slope bodies. Loose sandy soil slopes has a very low strength so that expensive construction is needed. One possible way to do this is to fill the pores of the soil with certain aggregates. One of the aggregates is cement. The cement material is chosen because cement when liquid can seep in and fill the pores of the soil. After drying this cement can increase soil permeability and reduce soil pore numbers. Filling cement into the soil pores can be done by injection of liquid cement. The problems that will be raised in this study are: What is the change in soil permeability rate if the soil is injected with cement and how much changes in soil pore size when injected with cement. The method used in this study is to make a test model in the laboratory. By comparing soil without cement injection with soil that has been injected with cement, it will be known to increase soil permeability and decrease the soil pore number. From the preliminary test with proctor test, the maximum density was 1,286 gram/cm3 and the optimum water content was 18%. Decrease of coefisien permeability from without cement injection to with cement injection 31,5 %.