Mahakam River Research Articles

Flood Reduction Modelling of Mahakam Cascade Lake towards the Mahakam River - East Borneo - Indonesia

Lake is a water source that has decreased its function and has damaged the ecosystem. The Mahakam cascade lake in the East Borneo-Indonesia consists of Jempang Lake, Semayang Lake, and Melintang Lake, which have the sedimentation problem caused by the land-use change. The sedimentation can cause floods in the Mahakam River. However, the Mahakam River that correlates with the Mahakam cascade lake cannot reduce the happened flood. This study intends to optimize flood reduction modeling of Mahakam Cascade Lake towards the Mahakam River in the Muara Kaman outlet. According to the optimization model, this research aims to simulate the flood reduction modeling due to the 3 discharge conditions: Q25, Q50, and Q100. The food reduction modeling uses the Linear Programming Model, and the model is built integrated due to the Cascade Lake. The methodology consists of a linear programming optimization model due to the 3 scenarios (Q25, Q50, and Q100). However, the analysis of the design flood uses the Nakayasu Synthetic Unit Hydrograph in the watershed and the Rational Method for the discharge in the lake. The capacity of Mahakam Cascade Lake due to the bathymetry data and AWLR is as follow: 1) Jempang Lake: 519,958,550.36 m3; 2) Melintang Lake: 696,012,192.74 m3; and 3) Semayang Lake: 1,195,593,435.86 m3. The optimization model result of flood reduction in the Muara Kaman is as follow: a) Scenario-1 (Q25): Qmuara Kaman = 32,729.80 m3/s; b) Scenario-2 (Q50): Qmuara kanam = 37,432.36 m3/s; and c) Scenario-3 (Q100): Qmuara kanam = 39,777.80 m3/s.

Modeling of water mass flow patterns at the Mahakam River and its sub-river of the Karang Mumus River

Modeling of water mass flow patterns at the Mahakam River and its sub-river of the Karang Mumus River

Sustainable Livelihood Framework Approach of Communities in Agricultural Sector of Middle Mahakam River, East

The Mahakam Watershed (DAS) supports various economic activities such as; coal mining, oil and gas mining, plantation activities, agriculture, fisheries and forestry. As a result of these activities, the Mahakam watershed experiences various problems, such as: water pollution and siltation. These impacts disrupt fishing and agricultural activities. Therefore, this study aims to analyze sustainable livelihood strategies for people who work as fishermen, fish farming and farmers. The sample in this study was selected using a purposive sampling technique, and to obtain data a structured interview technique was used through a questionnaire. Then data collected were analyzed using the Sustainable Livelihood Framework (SLF) approach. Based on the results of the analysis, the group of capture fishermen are at a low level of sustainable livelihoods, and groups of fish cultivators and farmers are at a high level of sustainable livelihoods.

STRATEGI PROMOSI DALAM MENINGKATKAN TAMU HOTEL GRAND BARUMBAY SAMARINDA SEBERANG

Precisely on the opposite side of Samarinda City which limits the flow of the Mahakam river, Grand Barumbay Hotel Samarinda Seberang is one of the resort hotels that has its own unique characteristics located in Samarinda Seberang. The purpose of this research is to find out and identify how the hotel promotion strategy in increasing Grand Barumbay hotel guests and what are the obstacles faced by the manager in promoting the Grand Barumbay Hotel Samarinda. This study aims to determine the hotel promotion strategy in increasing the number of guests visiting the Grand Barumbay hotel, Samarinda opposite. This type of research is qualitative. Sources of research data are key informants and informants. Data collection techniques in this research are in the form of observation, interviews, documentation, and literature study. Data analysis techniques used are data reduction, data presentation, and drawing conclusions. The results of this study indicate that the Grand Barumbay Samarinda Hotel Promotion Strategy is running with a promotional strategy that is applied, namely the marketing mix which includes Advertising, Personal Selling, Publicity, and Sales Promotion. The conclusion in this study is that the Personal Selling of the Grand Barumbay Samarinda hotel opposite is not in accordance with the theory because it is inefficient in promoting a hotel because of its individual nature in offering a product or service personally, Advertising, Publicity and Sales Promotion of Grand Barumbay Samarinda Hotel are in accordance with the theory, for hotel promotions, it is expected to update the latest promotional advertisements, create separate social media, especially Instagram and collaborate with tourism agencies or institutions for example travel, tourist attractions, tourism offices, organizations, and companies, and improve again in terms of appearance the front view of the hotel which can be seen clearly and attractively when viewed, especially guests or hotel visitors.

THE SUCCESFUL USE OF SAND CONSOLIDATION AT TUNU FIELD

Oil and gas productions are demanded more these days. The industries itself have to be creative in many ways to increase the productions. The industries have to take the risk no matter what to fulfill these demands including trying a few methods. Some of the techniques are brand new and there is always a possibility that it decreasing a production instead of increasing.TUNU Field has one of the biggest gas productions in the world and it belongs to Pertamina Hulu Mahakam. It is located in Mahakam River Delta of East Kalimantan, Indonesia. For almost 80 kilometers it is spread from north to south of the Mahakam River Delta and covering about 400 square kilometers. The reservoirs are characterized as multilayered reservoirs with perforated producing zones ranging from (MD) 700 m to 5100 m.Sand production in well is one of the obstacles that oil industries are facing when it comes to oil and gas productions. There is of course limitation to sand production; it can bring benefits to good performance in a suitable amount. It can also be completely harmful to a well or in producing oil and gas. To prevent a sand breakthrough, sand control is put to the test. In this paper, a new technique of sand control will be discussed along with its advantages and disadvantages. This new method is called sand consolidation.Before sand consolidation being treated, some criteria have to match the standard. If it does not meet the criteria, it could mean either the reservoir does not need a sand control or using a mechanical sand control. When a reservoir is ready to be injected with the sand consolidation treatment, there is some procedure to follow. With the different type of sand consolidation chemicals, the temperature of the reservoir is important to this operation. One wrong chemical can lead to failure.In sand consolidation, the velocity gas and the drawdown are being reviewed due to managing risk of the well's integrity and good productivity. To control sand successfully, several important objectives must be reached during consolidation. The primary objective of sand consolidation is to bond together the formation sand adjacent to every perforation. Considering the treatment is designed to function on formation sand a zone several feet in radius around the wellbore can be consolidated.Studies of consolidation failure mechanisms show that plastics for the treatment must be inactive to reservoir fluids, should have very quick curing days and must have a robust wetting property. Including the gas flow rate increases after the treatment. Keyword: Sand Consolidation

Long working hours, poor sleep quality, and work-family conflict: determinant factors of fatigue among Indonesian tugboat crewmembers

BackgroundTugboat crewmembers are susceptible to fatigue during their 24-h work shifts, despite the availability of rest time. The fatigue experienced by seafarers contributes to marine accidents and metabolic and cardiovascular diseases, which have long-term effects. This study aimed to analyse the association between working hours and fatigue and other possibly related factors in tugboat crewmembers.MethodThis comparative cross-sectional study included 127 tugboat crew members from 15 randomly chosen tugboats in Samarinda Harbor, Indonesia. Their fatigue levels while at work were measured using a reaction timer and standardised questionnaire. Personal and occupational data of crewmembers, including age, marital status, rating (job ranking), duration on board, length of seafaring experience, watch system, smoking status, coffee and alcohol consumption, and working hours, were collected. Moreover, sleep quality and stress levels related to work-family conflict were measured and analysed using the Pittsburgh Sleep Quality Index (PSQI) and Work-Family Conflict Scale (WCFS), respectively.ResultsThe study found that 40.2% of the subjects were classified as having fatigue. The determinant factors were long working hours (> 72 h/week), poor sleep quality, and work-family conflict [adj. OR = 13.32; 95%-CI (4.78–31.23)] and p < 0.001, [adj. OR = 4.49 (1.39–14.52)] and p = 0.012, [adj. OR = 2.87 (1.12–7.33)] and p = 0.028, respectively. However, personal and occupational factors, including age, marital status, duration on board, length of seafaring experience, smoking status, and coffee and alcohol consumption, were not significantly associated with crewmember fatigue.ConclusionThe incidence of fatigue among Indonesian tugboat crewmembers operating on the Mahakam River was considerably high. Working hours, sleep quality, and work-family conflict were strongly associated with fatigue in tugboat crewmembers; therefore, the working hours of tugboat crewmembers need to be improved. Crewmember lifestyle variables need to be studied further.

DESIGN FLOOD OF THE MAHAKAM LAKE CASCADE FOR REDUCING THE FLOOD DOWNSTREAM

The Mahakam lake cascade consists of Jempang, Melintang, and Semayang lakes. The cascade lakes have a complex hydrological system; the three lakes merged with the Mahakam River when flooding. Generally, analysis like that focuses on each lake; however, the cascade lakes are analyzed as a system in this research. In the dry season, the water is receding, and in the riparian part is becoming dry land even it is only left on the depth channel that is flooded. The extreme recede condition happened in 1997 during 192 days; however, the longest extreme flood condition lasted for 63 days in 2006. The lake function, which should be able to reduce the flood, cannot work optimally. Floods in this area happened every rainy season. This research intends to analyze the design flood that can still be stored by the storage capacity in each cascade lake (Jempang, Melintang, and Semayang). Therefore, the lake function for reducing the flood in this area can be optimized. The methodology consists of measuring water level depth in the lake multiplying by the lake section area, then conversed into discharge using the rational method. The lake boundaries were determined by spatial analyses that is GIS application. The result shows that the design flood in each lake is varied and depends on each lake capacity. The capacity of the Jempang lake is only for the design flood Q25, about 388.33 m3/s; the Melintang lake can only store the design flood Q10 that is about 140.10 m3/s, and the Semayang lake is only able to store the design flood Q25 that is about 82.05 m3/s. This result can be used as a reference to design the optimization model for reducing the flood downstream.

Upaya Pencegahan Pencemaran Air Sungai Mahakam melalui Pemodelan Geographically Weighted Logistic Regression pada Data BOD

Since the early years, Mahakam River has important roles in supporting human needs in East Kalimantan province. Activities around Mahakam watershed such as restaurants, fishery, and industries were in the potential of generating waste around the flow area. The waste consisted of domestic and nondomestic waste. The waste was a threat to the Mahakam River water quality. Water pollution around the Mahakam River was a threat to public health, and therefore, there’s a need for precaution. One of the precautions is to give the public information regarding the factors that influence the chances of polluted water in the Mahakam River increased through logistic regression modeling. One way to detect water pollution is to indicate by using Biochemical Oxygen Demand (BOD). BOD data was suspected spatial, therefore the appropriate statistical modeling is Geographically Weighted Logistic Regression (GWLR). GWLR is a regression model that developed from a logistic regression in which parameter estimation is done locally at every observation location. The purpose of the research is to determine the GWLR model on the BOD data of Mahakam River and to find out the factors that influence water pollution at 27 observation points along with the Mahakam River flow. The parameter estimation method is the Maximum Likelihood Estimation (MLE). The spatial weighting is calculated by using the Adaptive Bisquare weighting function and the optimum bandwidth is determined by using Generalized Cross-Validation (GCV) criteria. Research shows that the closed-form of the Maximum Likelihood estimator can’t be obtained analytically and the approximation is obtained by using Newton-Raphson (N-R) iterative method. Based on parameter testing of the GWLR model result, it was concluded that the factors were influences the probability of Mahakam River water were polluted based on the BOD indicator was locally and different in each 27 observation locations. The factors that influence locally were water temperature, acidity, Total Dissolved Solids (TDS), ammonia concentration, and water debit, meanwhile, the factors which influence globally were acidity and TDS.

Analisis Faktor-Faktor Yang Berpengaruh Terhadap Pencemaran Air Sungai Mahakam Menggunakan Pemodelan Geographically Weighted Logistic Regression Pada Data Dissolved Oxygen

Geographically Weighted Logistic Regression (GWLR) model is a local model of the logistic regression model applied to spatial data. Parameter estimation is performed at each observation location using spatial weighting. The spatial weighting is calculated by using an adaptive tricube function and bandwidth optimum was obtained based on Generalized Cross Validation (GCV) criteria. The purpose of this study was to obtain a GWLR model on the water pollution indicator Dissolve Oxygen (DO) in Mahakam River in East Kalimantan Province and to find factors affecting the probability of the Mahakam River water was not polluted based on DO indicator. The research data is secondary obtained from Environmental Department of East Kalimantan. The parameter estimation method was Maximum Likelihood Estimation (MLE). The research result showed that the closed form of ML estimator could not be found analytically and it can be approximed by using Newton-Raphson iterative methods. Based on the result of partial hypothesis test, the factors influencing the probability of the Mahakam River water was not polluted is different for every observation location. They were phosphate consentration, total dissolved solid and nitrite consentration. The factor influencing globally was total dissolved solid.

The Fisheries Economy in the Mahakam River: Benefits and Factors that Affect It

This study combines input variables and natural influences to measure fishing yields as productivity. The research was conducted in the central area of the Mahakam River watershed. The purpose of this study is to calculate the income of fishermen at each level of tidal levels and to analyse what factors that affect fisheries productivity. The research uses a mixed method analysis. The data used are primary data obtained by using a structured interview technique through a questionnaire to fishermen who live in the research location, the sampling technique of respondents using the purposive sampling technique. Data were analysed using profit analysis techniques and multiple linear regression. The results of the data analysis show that the highest profit for fishermen is when the conditions of the highest tide go to the lowest tide. Significantly, the fishermen's catch is influenced by two factors, namely the fishing location and their experiences.

Development planning to accelerate Sustainable Development Goals (SDGs) in Mahakam Ulu Districts as a new autonomous region

The new autonomous regions have been seen as a burden because many have not developed into areas that can build inclusive societies. The upstream area of the Mahakam River in 2013 bring forth a new autonomous region called the Mahakam Ulu Districts, and the study aims to describe development planning in the region. This research adopts a descriptive qualitative approach using secondary data. The research results show that the newly autonomous region of Mahakam Ulu Districts is a breath of fresh air for the people of the ideals of equitable development in their regions. Development planning has also upheld the SDGs’ goals; this can be seen from the programs that have been carried out, aiming to bring the Mahakam Ulu District prosperity and justice. The transformation of the values contained in the pillars of the SDGs has also felt to be present in the annual priority programs that have been carried out by Mahakam Ulu Districts, including in terms of social development, environmental development, economic development, and legal and governance development which continue to be pursued by all parties upstream of the Mahakam River, Mahakam Ulu Districts.

Kondisi Sungai di Indonesia Ditinjau dari Daya Tampung Beban Pencemaran: Studi Literatur

The condition of rivers in Indonesia in 2018, 25 rivers were heavily polluted, while in 2019, 38 rivers were heavily polluted . Efforts are needed to determine the carrying capacity of river pollution loads so that they can be used as guidelines for river management. This study aims to provide an overview of the conditions of Indonesia’s rivers through a literature review. This literature review uses 10 articles from the Google Scholar database for the period 2014-2020. The rivers under study do not have a pollution load capacity, namely the Code Yogyakarta river, the Bengawan Solo watershed of the Surakarta and Karanganyar sections, the Brantas river in Malang City, the Kupang river, Pekalongan City, the Mahakam river in East Kalimantan, the Winongo river, Sleman Regency, the section of the Brantas river Kekep-Punden Kota Batu, the segment of the Pesanggrahan river of the City; Garang river, Central Java Bedung river, Denpasar City. Most of the parameters that exceed the loading capacity of the entire river are BOD, COD, TSS, nitrite, nitrate, phosphate, and ammonia. The source of pollution in most rivers is unidentified (certain and uncertain sources of pollution). Generally, river management efforts are not carried out in an optimal manner to maintain water quality and condition .

Model-Model Regresi Weibull Univariat pada Indikator Pencemaran Air Dissolved Oxygen di Daerah Aliran Sungai Lingkungan Hutan Hujan Tropis Kalimantan Timur

A Univariate Weibull Regression is a model of regression developed from univariate Weibull distribution with the parameter scale is stated in parameter regression. There are some of univariate Weibull regression model, namely Weibull survival regression, Weibull hazard regression and mean model. Univariate Weibull regression model in this research is applied to the water pollution indicator dissolved oxygen (DO data at Mahakam river in East Kalimantan. The purpose of this study is to find out the model of univariate Weibull regression based on the parameter estimation by using maximum likelihood estimation method (MLE) and to find out the factors which affect to univariate Weibull regression in Mahakam river. The result shows that the closed form of the maximum likelihood estimator can not be found analytically, and it can be approximed by using the Newton-Raphson iterative method. Based on the result of partial hypothesis test for all the parameter regression, it was found that detergent concentration and nitrate concentration had significant influence to the DO in the water of Mahakam river.

Penaksiran Kandungan Klorida di Sungai Mahakam Wilayah Samarinda Tahun 2017 dengan Metode Cokriging

Cokriging is the interpolation method of value of an unsampled data by minimizing the variance of the estimation error by utilizing cross correlations between the main variable and the additional variable. This study aims to estimate the chloride content in the Mahakam River in Samarinda by using the cokriging method. The data of this study are spatial data that consists of the main variable data is chloride content and additional variable data is the pH of the water, as well as the coordinates of the observation location. Semivariogram (matrix covariance) is determined based on the best model, namely theoretical semivariogram. The best theoretical semivariogram model for cross variables is the exponential model, while the best theoretical semivariogram model for the main variable and additional variables are the spherical model. The selected theoretical semivariogram model was used to determine the semivariogram matrix in estimating chloride content in IPA Bantuas and Teluk Lerong. The results of estimation of chloride content in IPA Bantuas and Teluk Lerong are 1.91 mg/l and 1.64 mg/l. Based on the estimated chloride content in IPA Bantuas and in Teluk Lerong, it shows that the chloride content is still below the maximum threshold and meets the water chloride content standard for consumption by the Ministry of Health of the Republic of Indonesia, which is a maximum of 250 mg/l.

Analisis Data Ketinggian Permukaan Air Sungai Mahakam Daerah Kutai Kartanegara Tahun 2010-2016 Menggunakan Model Autoregressive Integrated Moving Average (ARIMA) Dengan Efek Outlier

Measurement of water level is useful as a guide for flood events in an area. As a result of global warming it is predicted that rainfall will increase and the water level will be high, so that the chances of flooding will increase. The method often used in forecasting is the method of Autoregressive Integrated Moving Average (ARIMA). ARIMA is one of the time series forecasting methods that has been studied in depth by Box and Jenkins. ARIMA's basic concepts include,identification of models, parameter estimation, diagnostic checks and forecasting. Forecasting results with the ARIMA method are inaccurate, on data that contains outliers. The weakness of the ARIMA method can be overcome using the ARIMA method with outlier detection. The type of outlier detection in this study is additive outlier (AO). The purpose of this study was to determine the ARIMA forecasting model with an outlier effect on the average water level data of the Mahakam River in the Kutai Kartanegara Region in front of the Tenggarong Museum Building from January 2010 - December 2016. The results showed that the best forecasting model was the river Mahakam Kutai Kartanegara Region is ARIMA ([12], 1,0) with the addition of 4 outlier effects and measure of goodness is AIC with a value of 250,0776.

PERENCANAAN MUSEUM KAPAL MOTOR DI TENGGARONG DENGAN PENDEKATAN ARSITEKTUR TROPIS

Tenggarong City has Mahakam River that connects between West Kutai Regency to Samarinda. The river length reaches 920 kilometers. This will be planning the Motor ship Museum, at the stage of this research in the form of primary and secondary data collection methods, analysis method consists of the analysis of the needs of space, space, space relations, site, building basic coefficients and Green basic coefficients, space and musical arrangement space, mass and mass material, shape, structure, utilities. Concept of building with the emphasis of tropical architecture in the application of building lighting Museum.Total amount of space 6,341.7 m2 divided by the area of building basic coefficient 6,341.7 area of the green base coefficient 4,227.8, for analysis site on the research is reviewing such as drainage, wind direction, Sun. Utility analysis such as clean water, dirty, rainy and piping on the Museum area. Type of vessel in the show, namely, motor ship freight, mines, vehicle transportation with the concept of cluster in the form of mass arrangement on the site, the transformation of the ship resembles the Mahakam river water bus transport ship, and the history of the ship. Keywords: Museum, Motor ship, Tenggarong City

Vitamin A supplements for preventing illness in children aged under 5: Mathematical and systematic approach at flooding disaster in Samarinda

Background: Heavy rains poured for several hours on sunday morning, causing the water level to rise at Benanga dam at the upstream of Karang Mumus river, the confluence of the Mahakam river. The Samarinda administration has applied an emergency protocol for fourteen days to assist 10,300 people affected by the flooding. Health City Office decided to distribute vitamin A to children under 5, as prevention strategy to avoid illness. Vitamin A refers to a subclass of retinoic acids long understood to help regulate immune function and to reduce morbidity of infectious diseases. Vitamin A is required for normal functioning of the visual system, maintenance of cell function for growth, epithelial integrity, production of red blood cells, immunity, and reproduction. Methods and materials: We evaluated the effect of prophylactic synthetic oral vitamin A supplementation compared with no treatment. We planned to conduct three subgroup analyses:1.Location: by flood affected area and buffer zone2.Age: 6–12 months v 1–5 years3.Sex: boys v girls. 1.684 children under 5 in the flood affected area, were given vitamin A, while children under 5 in the buffer area maintained with no treatment. The health status of these children were monitored for 3 months and reported directly to Health City Office Surveillance Department. Results: The morbidity of children under 5, in the buffer area were higher than in the flood affected area by 27%. 81% of cases of children under 5, in the buffer area within 3 months were Upper Respiratory Tract Infection, 12% were unspecified diarrhea. Only 27 children of 1.684 Children given Vitamin A were illness. No side affect or hypervitaminosis of vitamin A reported. Conclusion: Vitamin A supplementation is associated with reductions in illness problems in a range of settings compared to no treatment area in the buffer zone. Health Surveillance is maintained for approximately 3 months. However, there is a need for further studies comparing different doses and delivery mechanisms (for example, fortification). Until other sources are available, vitamin A supplements should be given to all children at risk of disaster, particularly where health access is limited.

Pengembangan Ekowisata Sungai Berbasis Masyarakat di Desa Pela Kutai Kartanegara, Kalimantan Timur

Abstract&#x0D; The uniqueness of natural biodiversity in East Kalimantan is a great potential to be developed as tourist attraction, especially related to ecotourism. Pesut Mahakam as one of the uniqueness is a kind mammal that lives in the water. Unlike the dolphins and whales, Pesut Mahakam or its Latin name Orcaella brevirostris lives in fresh water found in rivers and lakes in tropical and subtropical regions. In the past, pesut was mostly found along the Mahakam River in East Kalimantan, so that they were determined to be the identical fauna of East Kalimantan. However, its currently population were significanlyt declining so that the Pesut Mahakam is categorized as a protected animal because it is worried that the population will continue to decline.&#x0D; Tourism is recognised as a tool for conserving the existence of protected animal such as Pesut Mahakam. The development of ecotourism in river area, wish to protect the existance of this protected animals and its ecosystem while educating the community through the development of community based tourism. This study aims to identify the potential of tourism resources in Muara Pela area, which is one of roaming and feeding area of Pesut Mahakam and also other natural and cultural potentials that can be holistically developed into community-based ecotourism.&#x0D; This research was conducted using a participatory approach to the community around Muara Pela by assisting the community in the preparation of community-based tourism development programs.&#x0D; Keywords: community based tourism, orcaella brevirostris, ecotourism

Pengaruh Ukuran Partikel Bentonit Alam Teraktivasi Pada Penurunan Limbah Cair Sarung Tenun Samarinda

One industry that needs attention is Samarinda's woven sarong business. This industry produces liquid waste that is produced from the coloring process using De Congo Red which is an organic dye. Discussing the business of Samarinda's woven sarong industry discharges its waste directly into the Mahakam River around the house or weaving location which will cause a harmful impact on the environment. The main process in this research is adsorption with active bentonite to determine differences in activated bentonite particles in the adsorption process. The performance of the adsorption process through the parameters of BOD, COD, TSS and, pH of the liquid waste. The adsorption process was carried out by mixing active bentonite and Samarinda waste woven gloves with 0.25 grams: 1 mL. The mixture is then stirred for 1 hour at a rotational speed of 468 rpm. The size of the active bentonite was varied by 210, 230, 270, 310, 330, 370 and 400 mesh. The results of this study have proven that active bentonite has 400 mesh more than the BOD, COD, TSS and pH values according to the standard requirements according to the Decree of the Governor of East Kalimantan No. 26/2002. Also involved were 34.5 mg / L, 64 mg / L, 168 mg / L and pH 8.

Preconcentration of Ion Ni(II) using Ca-Alginate Modified Resin with Dimethylglyoxime as a Filler Material of Column

The research about the preconcentration of Ni(II) ions using Ca-alginate resin modified with dimethylglyoxime (DMG) as a material filler of the column has been done. The stage of preconcentration done by using the water sample was passed through the column, then eluted using HNO3. The amount of Ni(II) in the eluate was measured using atomic absorption spectrophotometer (AAS). Several important parameters in the preconcentration stage have been studied. The optimal condition at the stage of preconcentration Ni(II) ions was retention at pH 4, the volume of sample was 10 mL, the volume of HNO3 eluent was 4 mL at a concentration of 1.5 M, with the retention of capacity value was 2.4657 mg Ni(II)/g resin. The analytical performance of this method is good, showed with repeatability value as a percentage of the coefficient of variance value was 4.06%, and can increase the limit detection of Ni(II) ions was 3.94 times if compared to direct measurements with AAS. The method can be applied to the determination of Ni(II) ions in the water samples from Mahakam river at port Samarinda with recovery percentage value was &gt; 95 %, indicating that the matrix of samples did not affect the results of measurements.