System Dynamics for Simulation Model of Material Cost in Water Recources Project

Mundra, I Wayan; Hirijanto, Hirijanto

doi:10.36040/jstas.v1i2.3027

Cited by 3 publications

(8 citation statements)

References 6 publications

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“…The needed volume of infiltration wells is 4% of the watertight area, which can be written as: 4% x 16000 = 6400 m2, which indicates the total area of infiltration wells. Based on the numbers above, the needed number of infiltration wells can be estimated by dividing the total area of infiltration wells by the needed volume of infiltration wells [15]. It must be noted that infiltration wells height (depth) should not exceed water ground front height.…”

Section: The Needed Number Of Infiltration Wellsmentioning

confidence: 99%

Infiltration Wells Alternatives to Reduce Water Puddle in Lowokwaru District, Malang City

Hirijanto

Mundra

Wedyantadji

2021

JSTAS

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Surface waters give a plentiful supply of waters ready to be utilized for residence, farmland, fishery, industry, and electric generating machine, and most importantly, to deal with the problem of water scarcity (crisis). Rain is one of the hydrological cycles that help to preserve groundwater (shallow groundwater). During the rainy season, most waters go directly to the river and the sea without processing, creating inundations and flood in some places. Water resources, however, begin to lose their supporting capacity. Water supply is no longer balanced with the demand that starts to bulge up excessively. This disrupted balance is indicated by many critical lands that are less productive and incapable of absorbing waters to the ground. Considering this outline, the implementation of environmentally friendly infiltration wells can be a strategic option to solve the water balance issue. Some alternatives of infiltration wells are proposed as the solution to the problem that this research deals with. It is estimated that these wells can reduce 10%-15% of surface runoff rate in Lowokwaru District of Malang City, especially around Soekarno-Hatta Street that always leaves massive water puddle, especially during the rainy season. This research gives the relevant institutions and user community information about drainage construction, drainage network, and land use above drainage network. Through this information, it is expected that the follow-up can be given efficiently to produce an optimum and effective drainage network. Community participation, therefore, is needed to maintain the benefits of alternative infiltration wells to ensure their sustainability in the future.

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Section: The Needed Number Of Infiltration Wellsmentioning

confidence: 99%

Infiltration Wells Alternatives to Reduce Water Puddle in Lowokwaru District, Malang City

Hirijanto

Mundra

Wedyantadji

2021

JSTAS

Self Cite

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“…Consequently, there is a necessity for analysing the changes required. A suitable approach for this purpose is system dynamics, particularly in managing project budget costs [16]. The complexity and dynamic nature of construction project implementation are always related to prediction analysis since each project is always different and changes over time, influencing the project planning process.…”

Section: System Dynamicmentioning

confidence: 99%

“…So, the study of changes that are needed. One appropriate method is the system dynamics, primarily related to project budget costs [16].…”

Section: System Dynamicmentioning

confidence: 99%

“…Subsequently, the process consists of populating a mathematical equation within a stock-flow diagram. This critical step is fundamental to analysing system dynamics, particularly when dealing with causal loops within an integrated system [16].…”

Section: Conceptualization Systemmentioning

confidence: 99%

“…According to the causal diagram, it is necessary to quantify the data in order to obtain the desired outcome. Ventana simulation, also known as Vensim, is a software tool that significantly facilitates system dynamics analysis, making it both effortless and efficient [16].…”

Section: Model Formulationmentioning

confidence: 99%

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Project control has become a critical success factor in the project implementation phase. The execution of construction projects requires a well-planned and designed management system to achieve optimal results. The development of a project always involves several issues that need to be managed, one of which is cost. The planning and implementation stages greatly influence cost escalation in a construction project. Earned value method is a method of project controlling, through performance indicators in execution phase including cost performance index. This research aims to develops a financing model in project implementation based on the project's cost performance index and influencing factors. The data was collected by distributing questionnaires to project stakeholders involved in construction. Modelling was generated with combining earned value criteria with a dynamic systems approach. The result shows that the developed model was run well through verification and validation. The model and manual calculation generates the same value of cost performance index at the control point (at week 32) of 1,29. The value is greater than 1, therefore indicates no cost overruns or potential savings. The final goal of this study is the accuracy of actual costs by controlling the causal factors through model simulations.

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System Dynamics Approach for Water Resources Management: A Case Study from the Souss-Massa Basin

Guemouria

Chehbouni

Belaqziz

et al. 2023

Water

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In several areas, many social, economic, and physical subsystems interact around water resources. Integrated water management is applied to maximize economic and social welfare in an equitable manner without compromising the sustainability of vital ecosystems, mainly in hydrologic-stressed areas. The Souss-Massa basin, with its semi-arid climate, has a significant demand for agricultural, industrial, tourism, and domestic water. It constitutes a complex system where the lack of knowledge of all the interacting subsystems has led to a shortage of water in quantity and quality. The objective of this study is to investigate the interactions between supply and demand at different stages using a System Dynamics (SD) approach. The model developed promotes a holistic understanding of the interactions between the different problem indicators that operate in water resources management in order to support decision-making action and successfully manage water resources at the Souss-Massa basin scale. The chosen performance indicator is based on the achievement of a baseline sustainability index (SI) defined as the ratio of available water to supply water that should be higher than 20% to avoid a water stress situation. The multisource data were gathered from different government agencies for the period spanning between 2007 and 2020. The results showed that the current policies do not lead to sustainable water management. Groundwater withdrawals have increased considerably, from 747 Mm3 in 2007 to 4884 Mm3 in 2020. The balance between water supply and demand is only reached for three years, 2010, 2015, and 2018, without ever reaching an SI of 20%. The sensitivity analysis showed that the sustainability of water resources in the Souss-Massa basin is mainly impacted by the availability of surface water, irrigated areas, and irrigation efficiency. This study will be of great interest to policymakers to provide optimal and sustainable water management strategies based on improved water use efficiency, and to contribute to the sustainable development agenda in arid and semi-arid regions.

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System Dynamics for Simulation Model of Material Cost in Water Recources Project

Cited by 3 publications

References 6 publications

Infiltration Wells Alternatives to Reduce Water Puddle in Lowokwaru District, Malang City

Infiltration Wells Alternatives to Reduce Water Puddle in Lowokwaru District, Malang City

Optimization of Cost Performance Index in Construction Project Based on Influencing Factors

System Dynamics Approach for Water Resources Management: A Case Study from the Souss-Massa Basin

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