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Civil and Environmental Science Journal
Published by Universitas Brawijaya
Civil and Environmental Science Journal (CIVENSE) is an international journal, peer-reviewed research publication covering new concepts, theories, methods, and techniques related to science and engineering.
Articles
11
Articles
Rainwater Harvesting as Alternative Source for Wudlu Water in Indonesia

Susilo, Gatot Eko

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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Abstract

Indonesia is the country with the largest Muslim population in the world. And as a country with Muslim big population clean water for wudlu or purification must be available. Rainwater holds potential as an alternative source of wudlu water. Rainwater harvesting (RWH) for religious water supply is still very rare studied. Based on this, the research in this paper aims to calculate the potential supporting capacity of rainwater as an alternative sourceof wudlu water. Supporting capacity of rainwater harvesting (SCRWH) in this study was calculated by simulating inflow and outflow behavior at a rainwater harvesting facility in a mosque. Case study takes place at Nurul Iman Mosque in Southern Lampung. The mosque has an area of 168 m and able to accommodate 300 worshipers. Research show that the most effective reservoir size in the RWH facility in the observed mosque is between 15 to 30 m2 with SCRWH for wet years between 65% and 70% and for dry years between 44% and 53%, respectively. The availability of wudlu water in a mosque basically cannot be expected 100% comes from rain water only. In the application of RWH in a mosque the maintenance of theRWH facility must be undertaken well.

Potential use of aquatic plants in constructed wetlands for simultaneous removal of Phosphate and COD from laundry wastewater

A Tefa, Marcorio, Harisuseno, Donny, Haribowo, Riyanto

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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Abstract

One component of household wastewater that has a bad impact on the environment is waste that comes from washing which uses detergent, due to a fairly high phosphate and chemical oxygen demand (COD) concentration. The purpose of this study was to determine the potential of using aquatic plants to reduce phosphate and COD levels from laundry waste. This research was carried out using constructed wetlands model of laboratory scale using the combination of flow types of subsurface flow systems (SFS) and the type of vertical flow system (VFS) with a waste residence time of 5 days and 10 days. Based on the results, for model I, the average percentage of COD levels reduction is 67.62% and phosphate is 13.89%, while in model II, the average percentage of COD reduction is 59.93% and phosphate is 14.36%, after 10 days of waste residence time. Aquatic plants used in the modeling of constructed wetland can grow and reproduce well, this can be indicated by the growth of newshoots and flowers of these plants.

Analysis of Drainage Capacity and Rehabilitation Subjected to Rainfall and Reverse Flow of Marengan River as a Main Drain in Sumenep City, Indonesia

Cahya, Evi Nur, Andawayanti, Ussy, Resmani, Eva

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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Abstract

Land use changing in Sumenep city in recent years has caused runoff in several locations. Therefore, rehabilitations of existing channel to suit the surface runoff are needed. This paper presents capacity determination of existing drainage channels subjected to rainfall with 5-year flood discharge plan and consideration of sea tides effect to Marengan River which crossed Sumenep city. The proposed flood control methods in Sumenep city area was also discussed. The catchment of specified rural area was modelled using SWMM instrument to compare channel conditions before and after rehabilitation. Channel size and height of water level in channel due to rainfall together with the effect of backwater occurred in Marengan River caused by the sea tides was observed during the time. From the analysis, it was found that most of existing secondary drainage channels are uncapable to accommodate rainfall with 5-year flood discharge plan. From the available eight secondary drainage channels outlets, the last three outlets were subjected to reverse flows effect in Marengan River due to sea tides. In order to reduce the occurance of surface runoff inundation, secondary drainage channel rehabilitation was planned at each outlet, and these proven capable to accommodate rainwater runoff and reverse flow as well

Urban Growth Modelling of Malang City using Artificial Neural Network Based on Multi-temporal Remote Sensing

Nugroho, Agung Bayu, Hasyim, Abdul Wahid, Usman, Fadly

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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Abstract

In this study, the prediction of urban growth was simulated by Artificial Neural Network (ANN) model using MOLUSCE, plugin of QGIS. Objectives of this study is to illustrate the urban growth in Malang City over time span of 24 years and also to predict the future of urban growth using ANN model for the year 2027. Land cover maps were extracted for 2003, 2009 and 2015 via remote sensing images from Landsat ETM+ and OLI, respectively. The overall classification accuracy and kappa coefficient for all classified maps were over 85% and 0.76, respectively. According to the simulation result, 1049.58 ha of vegetation and 241.29 ha of bare land in 2015 would experience a transition to built-up areas in 2027. Then, the built-up areas would experience an increase by 11.79% from 2015 to 2027. In 2027, the built up areas would covered the city by 73.21% of the city area. There was a trend in increasing of built-up areas during the period 2003 to 2027. Overall, the result shows that urban growth models by using ANN model can be a considerable option for future changes according to past and current factors.

Analysis of Waikelo Port Breakwater Failure through 2D Wave Model

Winarta, Bambang, Damarnegara, A. A. N Satria, Anwar, Nadjadji, Juwono, Pitojo Tri

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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Abstract

Waikelo Port is located in South West Sumba of East Nusa Tenggara. The port facilities are protected by breakwater with a vertical wall construction and it was built in a relatively deep ocean at -15m of Low Water Sea Level (LWS). On 21 of January 2012, an earthquake with magnitude of 6.3 Richter scale occurred around Sumba Island and it caused cracking in the concrete wall of breakwater. Then, 4 days after on 25 st January 2012, a heavy wind of 20–23 knots generated a high wave around 4.0–5.0m in Sumba strait. These high waves caused a critical damage on the west part of the breakwater. The damage of port facilities were getting worse when a storm called Lua hit on March 2012. This study was conducted to observe the effect of the extreme event in the failure of breakwater. The result of two-dimensional (2D) wave model shows that the wave heights in the area of breakwater are varied 3.80 to 4.0m. It is quite greater than the wave design of 50 years return period (= 2.00m) which was used in breakwater design and calculation. This observable fact confirms that the failure of breakwater was caused by the continuous extreme events that exceed the design criteria

North Jamrud Terminal Warehouse Performance by The Effect of Halal Logistics Issue

Ingsih, Ita Suhermin, Arifin, M. Zainul, Wicaksono, Achmad

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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Abstract

The Government today, Government Business Entity and mass media in Indonesia are starting to pay attention to halal, since the turnover of halal products of the world has reached nearly 2 trillion dollars while Indonesia is still larger to be a consumer than a manufacturer. Not only foods, consumers in the world today want cosmetics to pharmaceutical products that have been halal certified. In Indonesia, problems with the potential of halal market today are still hit on the discourses. Indonesia still limited awareness not yet dared to action, whereas in nonMuslim countries themselves many have implemented halal supply chain. The establishment of Halal Hub Port in Tanjung Priok as the first Halal Hub Port pilot project in Indonesia is the forerunner to establish Halal Hub Port in other parts of Indonesia. Therefore, it is necessary to examine the needs of Halal Warehouse at Tanjung Perak Port which in fact is also a major port in Indonesia and is a distribution door for the central and eastern part of Indonesia. The study was conducted on 190 respondents who are stakeholders of Tanjung Perak Port. Using the Importance Performance Analysis method, the results of the research produced a quadrant graph where quadrant A is the main priority containing performance of L/U equipment in terminal, performance of L/U workers/operator in terminal, separation of halal and non-halal products in halal warehouse, sorting of halal and non-halal products that have been damaged, cold storage separation between halal and non-halal products, clean and avoid contamination between products, special training for officers in halal warehouse, and hygiene facilities for officers in warehouse/halal warehouse. Quadrant B is to maintain the achievement contains 11 items, Quadrant C is low priority contains 5 items, and Quadrant D is excessive contains 5 items. The existence of 8 items entered in quadrant A, indicating that stakeholders at Tanjung Perak Port are very aware with the potential of Halal Warehouse.

The Application of Modal Split Using Revealed and Stated Preference Techniques: A study in Malang

Hidayat, Muhammad Nurjati

Civil and Environmental Science Journal Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

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Abstract

In this study we investigate modal split and travel behaviour in Malang by conducting person trip survey in study area. The purpose is to understand respondents’ travel behaviour and their preferences in selecting mode of transport. This is carried out to understand what are respondents feel regarding their perception on mode of transportation that available to them. The data being used are Revealed Preference (RP) and Stated Preference (SP) data. The first data based on present situation of respondents (including respondents’ characteristics and daily travel information), while the second one is hypothetical scenario that has not available in present condition. These data then compared and analysed using Multinomial Logit Model (MNL).

Data Generation In Order To Replace Lost Flow Data Using Bootstrap Method And Regression Analysis

Susilo, Gatot Eko

Civil and Environmental Science Journal Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

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Abstract

This paper aims to find method to generate data in order to replace lost flow data in the series of discharge data in Sungai Seputih River, Lampung Province. Bootstrap simulation is used to estimate the discharge data and complete the existing discharge data. Regression analysis is also used to find the pattern of data distribution. Results of the research show that both methods are able to generate new series of flow data that the distribution is similar to available field data. Results also show that the use of statistical methods is one way to tackle the problem of data limitations due to missing or unrecorded data. The weakness of data generation using a combination of Bootstrap methods and regression analysis is the disappearance of extreme values in the data series. Existing extreme values have been modified to ideal values that satisfy certain distributions. However, careful analysis is required in using statistical method, so that the results of analysis do not deviate from the field conditions.

Application of Polynomial Rocking Bearings as Seismic Isolation System on Irregular Bridges

Anugerahputra, Krisna Febrian, Tzu Ying, Lee, Wibowo, Ari

Civil and Environmental Science Journal Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

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Abstract

Friction Pendulum System (FPS) is one of the conventional sliding isolators which widely used and effectively proved to reduce seismic hazard in far-fault earthquakes. However, it may not be effective when the structures are induced by near-fault earthquakes because the earthquake’s period is usually close to the isolation period. In this study, a Polynomial Rocking Bearing (PRB) which has variable isolation stiffness is used to improve the performance of seismic isolation systems applied on irregular bridges under near-fault earthquakes. The PRB is composed by an articular joint and concave rocking surface. The rocking surface is defined by a sixth-order polynomial function. Based on previous studies, the PRB has been verified to effectively suppress the large isolator displacement subjected to near-fault earthquakes on building and regular bridges. However, it has not been used yet in the irregular bridges. This study aims to analyze the behaviour of Polynomial Rocking Bearing installed on an irregular bridge. As compared with Friction Pendulum Systems (FPS), the performance of PRBs is much better to effectively suppress the displacement of the bridge deck in both near and far-fault earthquakes.

Application of Artificial Neural Network For Defining The Water Quality in The River

Haribowo, Riyanto, Dermawan, Very, Yudha, Nevandria Satrya

Civil and Environmental Science Journal Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

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Abstract

Predicting point and nonpoint source runoff of dissolved and suspended materials into their receiving streams is important to protecting water quality. Therefore, it is important to monitoring the condition of river water quality. The purpose of this study is to predict water quality in small streams using an Artificial Neural Network (ANN). The study focuses on small stream in tributary of Brantas River. The variables of interest are dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), pH and temperature (T). To validate the performance of the trained ANN, it was applied to an unseen data set from a station in the region. The result show that the prediction of DO is 6.03 mg/litre, pH is 6,47 mg/litre and temperature is 25.18°. With the relatively error was 15.63%, 12.64% and 14.12% respectively. It was finally concluded that ANN models are capable of simulating the water quality parameters.