scholarly journals Infiltration wells utilizing watershed conservation for flood prevention

2021 ◽  
Vol 878 (1) ◽  
pp. 012056
Author(s):  
M Situmorang ◽  
S Setiyadi ◽  
L E Hutabarat
Keyword(s):  
Secondary Data ◽  
Infiltration Rate ◽  
Water Area ◽  
Coverage Area ◽  
Flood Prevention ◽  
Groundwater Balance ◽  
Watershed Conservation ◽  
Discharge Plan ◽  
Water Problems ◽  
Groundwater Infiltration

Abstract Rainfall is a determining factor in analyzing planned floods. This research was conducted by collecting secondary data and the field data concerning the soil’s ability to infiltrate the volume of rainfall. Data processing is carried out by statistical analysis to estimate the average rainfall, intensity value, estimated discharge plan, volume of runoff and estimated infiltration rate. These parameters are important related to the infiltration well dimensions planning and the conserving water area. From the research results, it is shown that infiltration rate and optimal dimensions of infiltration wells very dependent on rainfall discharge and runoff volume in each region. Artificial infiltration is an alternative solution for maintaining groundwater balance and overcoming water problems. With groundwater infiltration, groundwater infiltration can maintain a relatively stable groundwater depth. Infiltration rate in RT 06 Cawang are 54,03 cm/hour lower than in Kelurahan 11 Cawang East Jakarta are 54,12 cm/hour, with perimeter area of wells DSP = 1,5 m2, Depth of well (HSP) = -1,89 m2 and coverage area of well (ASP) = 1,77 m2.

scholarly journals Mitigasi Permukiman Tepi Sungai di Kelurahan Mlatiharjo

Ruang ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 94
Author(s):  
H.N. Nugroho ◽  
N. Alfibrian ◽  
M.R.D. Sabana ◽  
D. Labiba ◽  
T. Mintiea ◽  
...  
Keyword(s):  
Growth And Development ◽  
Qualitative Method ◽  
Quantitative Method ◽  
Secondary Data ◽  
Water Area ◽  
Disaster Mitigation ◽  
Flood Prevention ◽  
Water Flows ◽  
Tidal Water ◽  
The Government

Semarang City is passed by Sungai Banjir Kanal Barat dan Sungai Banjir Kanal Timur which is the purpose of development of these two canals as a form of flood prevention in Semarang city because Semarang city is prone to flood disaster. Floods that occur in Semarang city can be divided into three sources, namely flood shipment generally comes from the upper regions such as Semarang regency, especially Ungaran District, local floods that are the result of river water flows and times, and rob floods coming from tidal water area Coastal Semarang. Although the construction of artificial river has been done by the government of Semarang City, until now the flood is still one of the main problems that hinder the growth and development of Semarang City. The government has made efforts to normalize the Sungai Banjir Kanal Barat, but until now has not been able to do the normalize Sungai Banjir Kanal Timur. The method used in this research is quantitative method that uses secondary data to be processed and qualitative method in the form of gathering perspective of people living on the banks of BKT River, precisely in Mlatiharjo RW IV and RW V Village by way of interview and direct observation. The final result of this research is siteplan design area, the result of design analysis, management and financing management, and recommendation. The concept offered is Mlatiharjo Eco Riverfront Settlement Mitigation, a design concept that focuses on reducing flooding with disaster mitigation efforts.

Kajian Debit Sungai di DAS Wae Ruhu, Kota Ambon

2018 ◽  
Vol 1 (1) ◽  
pp. 18-23
Author(s):  
Matheus Souisa ◽  
Paulus R. Atihuta ◽  
Josephus R. Kelibulin
Keyword(s):  
River Discharge ◽  
River Flow ◽  
Secondary Data ◽  
Data Retrieval ◽  
Sediment Discharge ◽  
Flood Prevention ◽  
Retrieval Processes ◽  
Water Catchment ◽  
Steep Slopes ◽  
Station Point

Ambon City is a region consisting of hilly areas and steep slopes with diverse river characteristics. Research has been carried out in the Wae Ruhu watershed in Ambon City which starts from upstream (water catchment) to downstream. This study aims to determine the magnitude of river discharge and sediment discharge in the Wae Ruhu watershed. This research was conducted in several stages including, secondary data collection, research location survey, preparation of research tools and materials as well as field data retrieval processes which included tracking coordinates at each station point and entire watershed, calculation of river flow velocity, river geometry measurements, and sampling sediment. The results showed that the average river discharge in the Wae watershed in the year 2018 was 1.24 m3 / s, and the average sediment discharge was 6.27 kg / s. From the results of this study and the field observations proposed for flood prevention and the rate of sediment movement are the construction of cliffs with sheet pile and gabions.

scholarly journals Environmental Isotope of Radon-222 for Ciliwung River and Shallow Deep Water Interaction Study

2020 ◽  
Vol 21 (2) ◽  
pp. 139
Author(s):  
Evarista Ristin Pujiindiyati ◽  
Bungkus Pratikno
Keyword(s):  
River Water ◽  
Residence Time ◽  
Shallow Groundwater ◽  
Infiltration Rate ◽  
Scientific Basis ◽  
Dry Season ◽  
River Bank ◽  
222Rn Concentration ◽  
Significant Difference ◽  
Groundwater Infiltration

Aquifer in river bank area is mostly susceptive toward pollution occurring in river. One of parameters to determine the interaction process between groundwater and river is a natural isotope of 222Rn. The significant difference of radon concentration in groundwater and river water can be utilized as a scientific basis for investigating groundwater infiltration in river bank. Those studied parameters are residence time and infiltration rate. The research using 222Rn had been conducted in shallow groundwater of Ciliwung river bank - South Jakarta during rainy and dry season. The range of 222Rn concentration in shallow groundwater monitored in dry season was between 666 - 2590 Bq/m3 which was higher than that of rainy season ranging at 440 to 1546 Bq/m3. Otherwise, concentration of 222Rn in river water could not be detected (its 222Rn concentration = 0 Bq/m3) due to its much lower concentration either rainy or dry season. During dry season monitoring, equilibration between groundwater and river water was reached at the distance approximately 98 - 140 m away from river side. Estimating residence time based on 222Rn concentration at nearest site from the river and at equlibration area was 4.2 days such that the infiltration rate from river water into aquifer might be 7.8 m/day.Keywords: 222Rn, groundwater, residence time, infiltration rate.

An approximate solution for two-dimensional groundwater infiltration in sewer systems

2013 ◽  
Vol 67 (2) ◽  
pp. 347-352 ◽  
Author(s):  
Shuai Guo ◽  
Tuqiao Zhang ◽  
Yiping Zhang ◽  
David Z. Zhu
Keyword(s):  
Approximate Solution ◽  
Infiltration Rate ◽  
Groundwater Table ◽  
Two Dimensional ◽  
Sewer Pipe ◽  
Transformation Technique ◽  
Sewer Systems ◽  
Line Defects ◽  
Groundwater Infiltration ◽  
Surrounding Soil

Estimating groundwater infiltration into sewer systems is important for wastewater treatment operators and municipalities. This paper presents an approximate solution for steady-state groundwater infiltration into sewer systems through line defects. The groundwater table was assumed to be horizontal and the aquifer homogeneous and isotropic. Mobius transformation technique and equivalent circumference method were introduced to solve the governing equation. The infiltration rate is found to be controlled by the hydraulic conductivity of the surrounding soil, the total hydraulic head above the sewer pipe, the size of the sewer pipe, the position of the defect, and the size of the defect.

scholarly journals Impact of beel encroachment on aquatic biodiversity and vulnerability of poor fishermen in Noagaon District, Bangladesh

2020 ◽  
Vol 6 (2) ◽  
pp. 244-254
Author(s):  
MA Salam ◽  
KM Shakil Rana ◽  
Md Touhidur Rahman
Keyword(s):  
Remote Sensing ◽  
Image Interpretation ◽  
Group Living ◽  
Secondary Data ◽  
Data Interpretation ◽  
Water Area ◽  
Population Pressure ◽  
Aquatic Biodiversity ◽  
Fish Biodiversity ◽  
Over Time

Natural water bodies in Bangladesh are under threat of encroachment due to high population pressure, overexploitation, change of watercourses, and siltation. Therefore, the present study carried out to assess the degree of encroachment of floodplains and its impact on fish biodiversity and the livelihoods of the neighboring fishing communities. The study covered three beels of Naogaon district through remote sensing image interpretation and PRA techniques. The study used three dates remote sensing images and field data which supplemented with the secondary data from diverse origins. Data collected through the recalling method, personal interview with a structured questionnaire and livelihood analysis of fishermen and non-fishermen group living around the beels. The data interpretation showed the water area reduced by 80% from 1981 to 2016 in dry season that converted to boro rice cultivation gradually over time. The type of fishing gears and their use also changed radically over time in all the three beels. The fish catch increased steadily from 1981 and reached its peak in 1996, and then started to fall and continued up to 2016 in all the three beels. The study identified thirty species of SIS and SRS in 1981 that were gradually reduced to 6, 8 and 9 in Digholi, Fatepur and Pakuria beels respectively in 2016. Fish biodiversity reduced as fish-friendly large mesh cotton net replaced by the smaller mesh jagotber jal and monofilament synthetic current jal. Moreover, the annual income of the fishermen family was lower than non- fishermen family in beels areas. The current study clearly identified significant encroachment of floodplains area by agricultural activities between 1981 and 2016 and aquatic biodiversity reduced dramatically and the livelihoods of poor fishermen became vulnerable. Asian J. Med. Biol. Res. June 2020, 6(2): 244-254

scholarly journals Analysis of groundwater quality in Cimahi City of West Java Province

2021 ◽  
Vol 894 (1) ◽  
pp. 012037
Author(s):  
L O L Putri ◽  
E Wardhani
Keyword(s):  
Water Quality ◽  
Population Growth ◽  
Primary Source ◽  
Secondary Data ◽  
Total Coliform ◽  
Clean Water ◽  
The Republic ◽  
Groundwater Infiltration ◽  
Required Quality

Abstract Cimahi City is currently experiencing a clean water crisis, the cause of which is increasing population growth, so that water needs increase and land conversion, which results in reduced groundwater infiltration. The primary source of clean water in this city is groundwater. Population growth and residential development have an impact on pollution originating from domestic waste. These two things cause the quality and quantity of groundwater in Cimahi City to be increasingly critical. This study aims to analyze the quality of groundwater used by residents of Cimahi City. The data used is secondary data from the Environmental Service in 2019. Sampling was carried out at thirty points in Cimahi City spread over 14 urban villages, namely Citereup, Pasir Kaliki, Cibereum, Cibabat, Cipageran, Cimahi, Leuwigajah, Setiamanah, Karang Mekar, Cibeber, Melong, Cigugur, Padasuka, and Utama. The number of sampling is 1-2 samples/urban village. Based on the results of the analysis of parameters that do not exceed the required quality standards based on the Regulation of the Minister of Health of the Republic of Indonesia No. 32 of 2017 concerning the requirements and supervision of pristine water quality, namely: turbidity, Manganese, nitrate, detergent as MBAS, and total coliform. Based on the results of calculations with the water quality index, it is stated that the quality of groundwater in Cimahi City is in the normal-poor category.

scholarly journals Distribution of Water Infiltration Rate in Ciliwung Watershed

2016 ◽  
Vol 30 (1) ◽  
pp. 24
Author(s):  
Irfan Budi Pramono
Keyword(s):  
Information System ◽  
Water Absorption ◽  
Catchment Area ◽  
Infiltration Rate ◽  
Water Area ◽  
Water Infiltration ◽  
Residential Areas ◽  
Soil Permeability ◽  
Surrounding Areas ◽  
The City

Floods in Jakarta showed that the Ciliwung watershed and surrounding areas in critical condition. More than 50 % of land cover Ciliwung watershed is residential. Planting trees in residential areas have been insufficient to infiltrate as much water into the ground. Infiltration well is one possibility for absorbing water in residential areas. The purpose of this study was to determine the variation in the level of water absorption Ciliwung watershed and surrounding areas. The method used is overlaying analysis of the factors that determine the rate of water infiltration with geographic information system. Each of these factors gave weights and scores to obtained variations Ciliwung water infiltration rate. The results showed that the regions with the highest levels found in the upper catchment area and the city of Bogor, middle absorbtion water area was in Bogor Regency, low water absorption areas in Depok , South Jakarta , and East Jakarta . While in North Jakarta, Central Jakarta and West Jakarta the water absortion is very low level due to the shallow ground water level and very low soil permeability. Map variations in water absorption can be used as a material consideration for determining the locations of recharge wells effectively.

The Event of Forest Fire in Indonesia in the Perfective Environmental Ethics Anthropocentrism

2018 ◽  
Vol 1 (1) ◽  
pp. 122
Author(s):  
Suharto ◽  
Kamaruddin Eddiwan ◽  
Husni Thamrin
Keyword(s):  
Environmental Ethics ◽  
Forest Fires ◽  
Secondary Data ◽  
Forest Products ◽  
Human Action ◽  
Provincial Government ◽  
Primary Data ◽  
Flood Prevention ◽  
The People ◽  
Non Timber Forest Products

<p><em>This study aims to analyze forest fires in Indonesia in terms of anthropocentric environmental ethics perspectives. The method used is the method of observation, and the primary data can be by interviewing the people who live in the location of forest fires in Riau province, and the perpetrators of illegal logging, and companies that use the forest. While the secondary data obtained from statistical data, and from the Riau provincial government, and then the data is analyzed descriptively. In the perspective of the environmental ethics of anthropocentrism, the forest is an invaluable resource (biodiversity as a source of germplasm, timber and non-timber forest products, the water regulator, flood prevention and erosion and soil fertility) whose utilization and protection should be regulated accordingly with relevant and applicable laws and government regulations. Events of forest fires are one form of human action that is contrary to the principles of environmental ethics, resulting in large casualties and losses. In fact, in anthropocentrism more emphasis on the human interest that has led to human behaviour that tends to damage nature.</em><em></em></p>

scholarly journals Delimitation of homogeneous regions in the UNIFESP/EPM healthcare center coverage area based on sociodemographic indicators

1999 ◽  
Vol 117 (1) ◽  
pp. 25-33
Author(s):  
Karina Yuri Harada ◽  
Julieta Gonçalves Silva ◽  
Simone Schenkman ◽  
Eliana Tiemi Hayama ◽  
Francisco Roberto Gonçalves Santos ◽  
...  
Keyword(s):  
Secondary Data ◽  
Action Planning ◽  
Public Health Action ◽  
Coverage Area ◽  
Clear Trend ◽  
Minimum Income ◽  
Healthcare Center ◽  
Proportional Mortality ◽  
Homogeneous Regions ◽  
Sociodemographic Indicators

CONTEXT: The drawing up of adequate Public Health action planning to address the true needs of the population would increase the chances of effectiveness and decrease unnecessary expenses. OBJECTIVE: To identify homogeneous regions in the UNIFESP/EPM healthcare center (HCC) coverage area based on sociodemographic indicators and to relate them to causes of deaths in 1995. DESIGN: Secondary data analysis. SETTING: HCC coverage area; primary care. SAMPLE: Sociodemographic indicators were obtained from special tabulations of the Demographic Census of 1991. MAIN MEASURES: Proportion of children and elderly in the population; family providers’ education level (maximum: >15 years, minimum: <1 year) and income level (maximum: > 20 minimum wages, minimum: <1 minimum wage); proportional mortality distribution. RESULTS: The maximum income permitted the construction of four homogeneous regions, according to income ranking. Although the proportion of children and of elderly did not vary significantly among the regions, minimum income and education showed a statistically significant (p<0.05) difference between the first region (least affluent) and the others. A clear trend of increasing maximum education was observed across the regions. Mortality also differed in the first region, with deaths generated by possibly preventable infections. CONCLUSION: The inequalities observed may contribute to primary health prevention.

scholarly journals THE LIQUIDITY AND PROFITABILITY TRADEOFF OF COMMERCIAL BANKS IN NIGERIA

2021 ◽  
Vol 2 (2) ◽  
pp. 17-26
Author(s):  
O. D. Adegboye
Keyword(s):  
Correlation Coefficient ◽  
Commercial Banks ◽  
Management Strategies ◽  
Secondary Data ◽  
Least Square ◽  
Annual Reports ◽  
Return On Assets ◽  
Coverage Area ◽  
Liquidity Management ◽  
Ordinary Least Square

This study used empirical facts and assessed the trade-off of profitability versus liquidity (and vice versa) for five commercial banks in Nigeria. Multivariate research design, regression analysis, Ordinary Least Square, and correlation coefficient approaches were used to apply quantitative methodologies to data collected. Amongst the population of twenty-two banks, Zenith, First, United Bank for Africa, Guaranteed Trust and Union Banks were chosen as case studies for this study using a purposive sample approach. Secondary data was gathered from their five-year annual reports, which were published between 2015 and 2019. The correlation coefficient was employed to test the hypothesis, which revealed that there was a statistically perfect correlation (positive and negative) between LA (loans), BA (bank advances), and MDI (marketable debt instruments) against PAT (profit after tax) and ROA (return on assets). Furthermore, since banks strive to maintain their current assets, the findings revealed that efficient liquidity management is a key determinant that may boost or impair a bank’s profitability. To avoid future insolvency and bankruptcy, this study recommends that these banks use contemporary and effective liquidity management strategies amid the current post-pandemic environment. In addition, while focusing on the same topic of research, interested scholars should make significant use of a broader data coverage area. 

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