Civil and Environmental Science Journal (CIVENSE)

Assessment of Water Supply System Performance Indicators Based on the Customer Bill-Based Approach

2023-03-17T01:15:26+00:00

Significant efforts have been undertaken over the last two decades by governmental organizations and local and international non-governmental sectors to improve water supply and sanitation structures; however, there are significant challenges to the town's growth and expansion. Chiro town's population is increasing, and the community is affected by water and excreta-borne diseases as a result of a lack of proper sanitation facilities and a water supply system. In this study, billed data from Chiro Town water supply service enterprise customers have been used to assess the performance of the water distribution network over ten years (2011-2020). The findings show that the Town's water coverage is 62.9%, the water demand is 8,121.6m³/day, and the computed annual water production is 4,222.3m³/day. Residents of the town have complained about a lack of access to improved drinking water supplies, low water consumption, and sanitation facilities, particularly in the community of those who live in the town's borders and practice open defecation. For all domestic use, 16.32% and 83.68% of respondents used unprotected and protected water sources, respectively. This study suggested that strong sectoral coordination, community involvement, and sufficient financial resources were required to identify the root causes and provide an efficient water supply system in the study area.

Speed, Density, and Crash Relationship in Urban Arterial Roads

2023-02-16T22:05:08+00:00

Vehicle speed has an essential role in the occurrence of traffic accidents. Increasing the number of vehicles operating on the road will further increase the risk of traffic accidents because it is not balanced with discipline in driving. This study's purpose is to analyze the relationship between speed and traffic accidents that occurred in Gadjah Mada and Hayam Wuruk Road, Jember, through several variations of calculations. The independent variables used are average speed and 85th percentile speed and density, while the dependent variable used is the accident rate. The analysis used is a correlation test that determines the level of closeness of the relationship between the two variables and a regression test that helps estimate the relationship between the two variables through a regression equation model that will be selected based on conditions in the field. The results of this study indicate that lower speed is associated with a lower accident rate. Meanwhile, lower vehicle density leads to an increase in the accident rate. Speed management to improve traffic safety in Indonesia is needed. Direction for future research is presented.

Landak Industrial Park (LIP) Development Strategy

2023-09-13T03:50:32+00:00

Landak Industrial Park (KIL; Kawasan Industri Landak) is a national strategic project for Industrial Estates in West Kalimantan and is included in the List of 14 Priority Industrial Estate Developments Outside Java Island in the 2020-2024 National Medium-Term Development Plan (RPJMN; Rencana Pembangunan Jangka Menengah Nasional). The construction of KIL is experiencing delays, and to prevent the project from stalling, the main sources of industrial growth are new investment and increased utility from the current capacity. This study’s approach is both qualitative and quantitative. The analysis technique used is SWOT analysis using Internal Strategic Factor Analysis Summary (IFAS) and External Strategic Factor Analysis Summary (EFAS), developed using spatial analysis techniques from the concept of economic aggregation, which then generates value propositions and makes them the basis of a marketing strategy that includes market segmentation (segmenting), setting market targets (targeting), and creating a unique position (positioning). The result is from the SWOT analysis. KIL is in the turnaround quadrant, a position with a strategy of maximizing opportunities because it has major internal weaknesses. The geographical reach of other economic groups or business clusters that are quite close together is a trigger for the development of KIL. Scenarios from the KIL development strategy are expected to support strategic business decisions.

Relationship Between Soil Physical Characteristics and Infiltration Rate of The Practice Area of SMK PPN Banjarbaru

2023-04-17T02:15:16+00:00

The practice area for the Banjarbaru State Agricultural Development Vocational School (SMK PP N Banjarbaru) is located in Kemuning Village, South Banjarbaru District, Banjarbaru City, South Kalimantan Province. Regarding the land use in the research location, the majority is used for plantation land, which is one of the lands suitable for water catchment areas in Banjarbaru City. The Practice Land of PP N Banjarbaru Vocational School is one of the models of good catchment area land from good land use and irrigation systems. Conducted this analyze the infiltration rate and its influence on the physical properties of the soil. From the results of the infiltration test using a double ring infiltrometer which was then analyzed using the Horton method, the most considerable infiltration rate was in open land, namely 33.83 cm/hour, rubber plantations of 22.57 cm/hour, on palawija land it is 15.57 cm/hour and on mahogany land, it is 14.47 cm/hour. From the results of the analysis using the linear regression approach, the physical properties of the soil that can affect the infiltration rate include 16.7% bulk density, 75% permeability, and 90% moisture content. Meanwhile, particle density and porosity only affect 0.7% and 3.5%.

An Alternative Model to Estimate Total Suspended Solids Concentrations using Landsat 8 Imagery in Indonesia

2023-04-03T03:53:58+00:00

A regular monitoring program of water quality is generally performed using a direct measurement method, which requires substantial efforts and resources. These issues can be minimised using several options, one of which is Landsat 8 (L8). This imagery has been broadly used to measure several water quality parameters, especially Total Suspended Solids (TSS) concentrations, even in Indonesia. This paper will compare several models from previous studies and a modified model generated using data from various sites. The comparison is based on their competencies to estimate TSS concentrations. The competencies are determined by the coefficient of correlation (r), correlation of determination (R2), and residual standard error (RSE) parameters as these three parameters are strongly correlated, generally applied, and provide distinctive determinations. The best model should have the highest r and R2 values, while the RSE value should be the lowest. The results imply that TSS model 4 generated in this study provides comparable results with TSS model 1, which has been generally used in Indonesia and provided favourable results. Thus, it can be an alternative model to estimate TSS concentrations in Indonesia.

Study of Tiu Kulit Dam Reservoir Operational Pattern Simulation in Sumbawa Island

2023-03-17T00:40:00+00:00

Tiu Kulit Reservoir plays a pivotal role in managing water resources in West Nusa Tenggara, Indonesia, serving as a vital source for raw water, irrigation, and livestock consumption in the neighboring regions. This study aims to assess the operational dynamics of Tiu Kulit Reservoir across varying hydrological conditions, namely dry, normal, and wet years. The analysis is based on inflow rates and equilibrium water surface elevations. To achieve the objectives, an investigation of the reservoir's operation pattern was conducted. Inflow rates and equilibrium water surface elevations were scrutinized to discern operational behaviors under different hydrological scenarios. The findings indicate distinct operational strategies for Tiu Kulit Reservoir. During dry years, the outflow rate is restricted to 1.20 m³/s at a water surface elevation of +53.07 m. Conversely, the reservoir's operation in normal and wet years allows for a maximum outflow rate aimed at satisfying water demand, set at +57.00 m. In instances of excessive rainfall, the study highlights the potential for overflow beyond the spillway threshold. The study underscores the significance of these results for effective water management and resource allocation in the region. Understanding the reservoir's behavior under various conditions enables informed decision-making and sustainable utilization of water resources. To build upon this study, it is recommended to implement continuous monitoring systems for both inflow and outflow rates. Furthermore, the installation of rainfall monitoring stations within the catchment area would enhance data accuracy. Regular evaluations of the reservoir's operational patterns are also advised, allowing for adaptive strategies in response to evolving climate conditions. Moreover, future research endeavors should focus on augmenting water supply to meet the demands of a growing population and livestock, while optimizing agricultural practices to boost productivity.

Comparison of Formwork use in Building X Project in Surabaya City

2023-06-08T23:09:57+00:00

The Value Engineering method is a method that analyzes the problems of a project through a systematic and organized approach by eliminating unnecessary costs without reducing the function, appearance, quality, and reliability of the project. The object x building, which has an estimated project value of IDR 42,812,329,371 in structural work. With the estimated value of the work costing a lot, it is, therefore, necessary to make efforts to streamline costs by using the value engineering method; this study aims to choose an alternative material for it. This research method uses a Pareto chart to find the highest work value. The results of this study indicate that the beam work is priced at IDR 15,088,457,899, floor plate work of IDR 12,530,471,281, column work of IDR 10,228,438,679. The results of the analysis of alternative structural calculations using semi-system formwork and full system formwork, which initially used conventional formwork, were simulated using alternative 1, namely semi-system formwork,k and by using alternative two full system formwork. The two alternatives are applied to column, beam and floor plate formwork. So, for this building, it is recommended to replace formwork because the conventional formwork used in this building incurs a large enough price, it is necessary to save on beam parts, and it is recommended to use full system formwork because the cost of beam formwork using full system formwork is IDR 134,950 per square meter. For the floor plate formwork, it is recommended to use a full floor plate formwork system because the cost per square meter is IDR 202,360. And for columns, it is recommended to use full system formwork because the cost of column formwork if using full system formwork is IDR 115,290. And from the use of all the full-system formwork for structural work, a total cost of IDR 40,312,992,291.32.

Wave Transformation Pattern in Submerged Breakwater Planning with 2D Wave Model at Mengening Beach, Badung Regency, Bali, Indonesia

2023-07-25T14:52:44+00:00

Mengening Beach is located in Badung Regency, Bali, Indonesia. The average erosion rate in Badung Regency is 1.96 m/year, so the right plan is a submerged breakwater to reduce wave energy coming to the beach, which causes erosion. This building artistically does not lessen the beauty of the beach and sea because it’s below the sea mean sea water level (MSL). Because the beach is a tourist area, it is essential to maintain the beauty of the beach. Two-dimensional wave modeling uses the CMS Wave model on SMS software version 10.1 with two modeling scenarios: before and after there is a submerged breakwater. The two-dimensional wave results show that the submerged breakwater plan can dampen waves in the building placement area, which was initially 1.3 m-1.4 m high to 0.9 m-1.3 m, so this submerged breakwater plan can reduce waves by 10%-40%. From this research, readers can learn how to plan a submerged breakwater and know the performance of the planned breakwater function at Mengening Beach.

BIM Implementation for Storing, Sharing and Capturing Knowledge in Indonesian Project Construction

2023-06-21T08:34:04+00:00

BIM as a digital representation of assets has been used to facilitate design, construction, and operation process to form a reliable basis for decisions. While knowledge is part of the company's assets, knowledge will be maintained in the system so that it may be recalled if needed if BIM is used to document, store, and distribute knowledge more easily. This study will determine how BIM adoption supports knowledge storage, knowledge share, and knowledge capture in Indonesian construction projects. Data was obtained by interview and analysed using qualitative method. The results showed that large state-owned construction companies in Indonesia had implemented BIM-based knowledge management to assist organisational knowledge management process, especially in knowledge capture, storage and share on several projects, and reduce knowledge loss due to time lapse. Finding also shows that knowledge created in a project is centralised in one model, and lessons or knowledge can be grouped with BIM user preferences.

Analysis of Made Lamongan Residential Drainage System Using SWMM (Storm Water Management Model) and HEC-RAS (Hydraulic Engineering Centre-River Analysis System) Models

2023-01-11T11:52:49+00:00

Made Lamongan Residential is located in an area that has a flat slope and is flanked by two rivers Kali Mengkuli and Kali Gorok, the problem in the study area is that the drainage system is unable to serve rainwater runoff. This is evidenced by the occurrence of inundation during the rainy season with high intensity. The height of the inundation that occurs in the Residential complex ± 60 cm with a reduction in inundation of more than 12 hours. The calculation results showed that there were several sections of the channel that occurred runoff with a planned Q5 flood discharge of 8.14 m³/sec. Based on the results of surveys in the field, many channels were found that had changed their dimensions due to the renovation of residents' houses. In this study, 1D channel hydraulic modelling was carried out using SWMM and HEC-RAS software to obtain a model that was close to the surface runoff conditions at the study site. The purpose of this study is to obtain the greatest handling of inundation in Made Residential in reducing the height of the inundation based on the model to be carried out, as well as obtaining the value of model calibration at the study site.