scholarly journals KEANDALAN EMBUNG LAMBADEUK UNTUK PEMENUHAN AIR BERSIH DI DAERAH PESISIR KECAMATAN PEUKAN BADA ACEH BESAR

2018 ◽  
Vol 1 (4) ◽  
pp. 971-984
Author(s):  
Setia Budi ◽  
Azmeri Azmeri ◽  
Syamsidik Syamsidik
Keyword(s):  
Coastal Area ◽  
Water Demand ◽  
River Flow ◽  
Dry Season ◽  
Clean Water ◽  
Wet Season ◽  
Microsoft Excel ◽  
Non Linear ◽  
Dam Operation ◽  
Inflow Discharge

Abstract : Water demand fulfillment in coastal area of Peukan Bada Sub District is still complicated. Peukan Bada Community in coastal area currently still depends on well water. The existence of Lambadeuk Small Dam located in Peukan Bada Sub District – Aceh Besar, which River Flow Area (DAS) is ± 2.27 Km², is expected to be able in fulfilling clean water demand. The objectives of this research are to find out water supply, to optimize the operation and to obtain the reliability of Lambadeuk Small Dam Operation. The method used in operating the small dam is analyzed by Non Linear Program using Solver Microsoft Excel. In optimizing the operation, it is divided into three season conditions. The highest inflow discharge of dry season is in January which is 0.222 m3/sec or 0.594 MCM, while the highest inflow discharge of normal season is in December which is 0.294 m3/sec or 0.787 MCM, and the highest inflow discharge of wet season is in November which is 0. 463 m3/sec or 1.199 MCM. The projection of population and clean water demand for population need in coastal area of Peukan Bada Sub District can be described as for population 5,954 in 2015, the clean water demand is 0.0099 m3/sec so that in 2035, the population will become 10,534 and the clean water demand will be 0.0176 m3/sec. The average inflow from 2015 to 2035 for dry season is 4.031 MCM, for normal season is 5.816 MCM, and for wet season is 9.077 MCM. Water release is 0.312 MCM, and basic water demand is 0.556 MCM. Optimization reliability of Lambadeuk Small Dam Operation is reliable and 100% can fulfill the water demand in the downstream of the small dam, and the management organizer of Lambadeuk Small Dam can also expand service area of clean water demand in the coastal area of Peukan Bada Sub District – Aceh Besar. Abstrak: Dalam pemenuhan kebutuhan air bersih di daerah pesisir Kecamatan Peukan Bada masih kesulitan untuk kebutuhan air bersih. Selama ini masyarakat di daerah pesisir masih mengandalkan air sumur. Dengan adanya Embung Lambadeuk yang terletak di Kecamatan Peukan Bada Kabupaten Aceh Besar, yang mempunyai luas Daerah Aliran Sungai (DAS) ± 2,27 Km², mampu untuk pemenuhan kebutuhan air bersih. Tujuan dari penelitian ini untuk mengetahui ketersediaan air, mengoptimalkan pengopersian dan mendapatkan keandalan pengopersian Embung Lambadeuk. Pada penelitian ini metode pengoperasian embung yang dianalisis menggunakan program Non Linear dengan solver Microsoft Excel. Dalam optimasi pengoperasian dikelompokan dalam tiga kondisi tahun musim, dimana kondisi tahun musim kering debit Inflow yang tertinggi berada pada bulan Januari sebesar 0,222 m3/dt dengan kapasitas  0,594 MCM, pada kondisi tahun normal debit yang tertinggi berada pada bulan  Desember sebesar 0,294 m3/dt  dengan kapasitas  0,787 MCM dan pada kondisi tahun basah debit yang tertinggi pada bulan Nopember sebesar 0,463 m3/dt dengan kapasitas  1,199 MCM. Proyeksi jumlah penduduk dan kebutuhan air bersih untuk pemenuhan penduduk di pesisir Kecmatan Peukan Bada, tahun 2015 dengan jumlah penduduk sebesar 5.954 jiwa, kebutuhan air bersih 0,0099 m3/dt dan Tahun 2035 jumlah penduduk sebesar 10.534 jiwa, kebutuhan air bersih 0,0176 m3/dt. Untuk Inflow tahun kering dari Tahun 2015 sampai Tahun 2035 Inflow rata-rata tahunan sebesar 4,031 MCM, tahun normal dari Tahun 2015 sampai tahun 2035 Inflow rata-rata sebesar 5,816 MCM, dan tahun basah Inflow rata-rata tahunan sebesar 9,077 MCM. Release air sebesar 0.312 MCM, dan kebutuhan air baku sebesar 0,556 MCM. Hasil yang dicapai adalah Pengoperasian Embung yang Optimal dan Keandalan Pengoperasian Embung. Dimana Keandalan Pengoperasian Embung Lambadeuk sangat berpengaruh dari volume dan periode waktu, dan terhadap Manajemen pengelola Embung Lambadeuk, bisa mengambil langkah-langkah untuk memperluas daerah layanan kebutuhan air bersih di pesisir Kecamatan Peukan Bada Aceh Besar.

scholarly journals Quantification of Temporal Variations in Base Flow Index Using Sporadic River Data: Application to the Bua Catchment, Malawi

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 901 ◽  
Author(s):  
Laura Kelly ◽  
Robert M. Kalin ◽  
Douglas Bertram ◽  
Modesta Kanjaye ◽  
Macpherson Nkhata ◽  
...  
Keyword(s):  
Water Resources ◽  
River Flow ◽  
Temporal Variations ◽  
Dry Season ◽  
Base Flow ◽  
Flow Index ◽  
Wet Season ◽  
Data Application ◽  
Base Flow Index ◽  
Long Term Trends

This study investigated how sporadic river datasets could be used to quantify temporal variations in the base flow index (BFI). The BFI represents the baseflow component of river flow which is often used as a proxy indicator for groundwater discharge to a river. The Bua catchment in Malawi was used as a case study, whereby the smoothed minima method was applied to river flow data from six gauges (ranging from 1953 to 2009) and the Mann-Kendall (MK) statistical test was used to identify trends in BFI. The results showed that baseflow plays an important role within the catchment. Average annual BFIs > 0.74 were found for gauges in the lower reaches of the catchment, in contrast to lower BFIs < 0.54 which were found for gauges in the higher reaches. Minimal difference between annual and wet season BFI was observed, however dry season BFI was >0.94 across all gauges indicating the importance of baseflow in maintaining any dry season flows. Long term trends were identified in the annual and wet season BFI, but no evidence of a trend was found in the dry season BFI. Sustainable management of the investigated catchment should, therefore, account for the temporal variations in baseflow, with special regard to water resources allocation within the region and consideration in future scheme appraisals aimed at developing water resources. Further, this demonstration of how to work with sporadic river data to investigate baseflow serves as an important example for other catchments faced with similar challenges.

Spatial clustering and longitudinal variation of Anopheles darlingi (Diptera: Culicidae) larvae in a river of the Amazon: the importance of the forest fringe and of obstructions to flow in frontier malaria

2011 ◽  
Vol 101 (6) ◽  
pp. 643-658 ◽  
Author(s):  
F.S.M. Barros ◽  
M.E. Arruda ◽  
H.C. Gurgel ◽  
N.A. Honório
Keyword(s):  
River Flow ◽  
Spatial Clustering ◽  
Malaria Incidence ◽  
Malaria Prevalence ◽  
Larval Habitat ◽  
Dry Season ◽  
Adult Mosquito ◽  
Anopheles Darlingi ◽  
Wet Season ◽  
Larval Distribution

AbstractDeforestation has been linked to a rise in malaria prevalence. In this paper, we studied longitudinally 20 spots, including forested and deforested portions of a temporary river in a malarigenous frontier zone. Larval habitat parameters influencing distribution of Anopheles darlingi (Diptera: Culicidae) larvae were studied. We observed that larvae were clustered in forested-deforested transitions. For the first time in the literature, it was verified that parameters determining larval distribution varied from deforested to forested areas. The proximity to human dwellings was also a significant factor determining distribution, but larvae was most importantly associated with a previously undescribed parameter, the presence of small obstructions to river flow, such as tree trunks within the river channel, which caused pooling of water during the dry season (‘microdams’). In deforested areas, the most important factor determining distribution of larvae was shade (reduced luminance). Larvae were absent in the entire studied area during the wet season and present in most sites during the dry season. During the wet-dry transition, larvae were found sooner in areas with microdams, than in other areas, suggesting that flow obstruction prolongs the breeding season of An. darlingi. Adult mosquito densities and malaria incidence were higher during the dry season. Our data correlate well with the published literature, including the distribution of malaria cases near the forest fringes, and has permitted the creation of a model of An. darlingi breeding, where preference for sites with reduced luminance, human presence and microdams would interact to determine larval distribution.

scholarly journals Kebutuhan Air Harian Masyarakat Desa Jada Bahrin Kabupaten Bangka

2020 ◽  
Vol 8 (1) ◽  
pp. 11-19
Author(s):  
Endang Setyawati Hisyam ◽  
Ferra Fahriani ◽  
Rahmad Hidayat
Keyword(s):  
Water Demand ◽  
Dry Season ◽  
Clean Water ◽  
Total Water ◽  
Factors Affecting ◽  
Artificial Pond ◽  
The People ◽  
Daily Water

Jada Bahrin village produces vegetables, rubber, pepper, and pineapple. The people in this village work as a farmer, fisherman, trader, and entrepreneur. They face a big problem to get water in dry season. They only rely on artificial pond to collect and distribute the water to the people. The goals of this study is to know the average daily water demand at present and the prediction of water needs for the next 10 years as well as the factors that influence the water needs in Jada Bahrin. Data for analysis were gathered by distributing questionnaires to respondents. Based on the analysis, the average daily water demand of each person in Jada Bahrin Village was 107.83 liters/person/day (Ipoph) and the prediction of the total water needs of Jada Bahrin Village in the next 10 years (2028) was 2.43 liters/second. Factors affecting the need for clean water were the type of work, the level of income and the influence of climate

scholarly journals Vulnerability of Communities in Drought-Prone Areas during the COVID-19 Pandemic in Semarang City

2021 ◽  
Vol 317 ◽  
pp. 01079
Author(s):  
Santy Paulla Dewi ◽  
Retno Susanti
Keyword(s):  
Water Supply ◽  
Water Demand ◽  
Quantitative Method ◽  
Secondary Data ◽  
Dry Season ◽  
City Government ◽  
Government Agencies ◽  
Clean Water ◽  
The Government ◽  
Primary Problem

Covid-19 pandemic still becomes a primary problem that influences many aspects. Some of the government efforts to reduce the spread of this virus are by continuing to urge people to comply with health protocols, one of which is by washing their hands after doing activities. This has implications for the water demand that rises and becomes an essential issues for drought-prone areas, especially when entering the dry season. Therefore, this study aims to examine the vulnerability of communities in drought-prone areas due to the increased demand for clean water during the pandemic. This research used a quantitative method by comparing water demand with the ability of water supply from the government and the community. The study uses secondary data from government agencies. The results of this study are to determine the vulnerability of drought-prone areas by dividing them into three zones, namely low, medium, and high. In addition, the results of this study are expected to provide recommendations to the government regarding the provision of clean water for the community during a pandemic. This is important because the efforts of the Semarang City government to overcome drought have tended to be reactive and unsustainable.

scholarly journals Flood risk reduction and flow buffering as ecosystem services: a flow persistence indicator for watershed health

2016 ◽  
Author(s):  
M. van Noordwijk ◽  
L. Tanika ◽  
B. Lusiana
Keyword(s):  
Land Cover ◽  
River Flow ◽  
Performance Indicator ◽  
Flood Damage ◽  
Dry Season ◽  
Wet Season ◽  
Decadal Time Scale ◽  
Flood Duration ◽  
Flooding Risk ◽  
Watershed Health

Abstract. Flood damage depends on location and adaptation of human presence and activity to inherent variability of river flow. Reduced predictability of river flow is a common sign of degrading watersheds associated with increased flooding risk and reduced dry-season flows. The dimensionless FlowPer parameter (Fp), representing predictability, is key to a parsimonious recursive model of river flow, Qt = FpQt−1 + (1−Fp)(Pt−Etx), with Q, P and E expressed in mm d−1. Fp varies between 0 and 1, and can be derived from a time-series of measured (or modeled) river flow data. The spatially averaged precipitation term Pt and preceding cumulative evapotranspiration since previous rain Etx are treated as constrained but unknown, stochastic variables. A decrease in Fp from 0.9 to 0.8 means peak flow doubling from 10 to 20% of peak rainfall (minus its accompanying Etx) and, in a numerical example, an increase in expected flood duration by 3 days. We compared Fp estimates from four meso-scale watersheds in Indonesia and Thailand, with varying climate, geology and land cover history, at a decadal time scale. Wet-season (3-monthly) Fp values are lower than dry-season values in climates with pronounced seasonality. A wet-season Fp value above 0.7 was achievable in forest-agroforestry mosaic case studies. Interannual variability in Fp is large relative to effects of land cover change; multiple years of paired-plot data are needed to reject no-change null-hypotheses. While empirical evidence at scale is understandably scarce, Fp trends over time serve as a holistic scale-dependent performance indicator of degrading/recovering watershed health.

scholarly journals An Environmental Flow Framework for Riverine Macroinvertebrates During Dry and Wet Seasons Through Non-linear Ecological Modeling

2021 ◽  
Vol 9 ◽  
Author(s):  
Qingyi Luo ◽  
Ming-Chih Chiu ◽  
Lu Tan ◽  
Qinghua Cai
Keyword(s):  
Water Resource Management ◽  
Ecological Niche Modeling ◽  
Environmental Flow ◽  
Dry Season ◽  
Water Requirement ◽  
Central China ◽  
Wet Season ◽  
Xiangxi River ◽  
Ecological Water Requirement ◽  
Non Linear

A suitable environmental flow is critical for the functional maintenance of riverine ecosystems. Hydropower plants alter the flow regime by decreasing or even drying up the streamflow downstream of the dams, thereby affecting ecosystem sustainability. In this study, we aimed to develop a robust environmental flow framework that can provide scientific evidence for sustainable water resource management. Using ecological niche modeling based on non-linear responses of species to habitat factors, we assessed the environmental flow in the Xiangxi River Basin of Central China during dry and wet seasons from a multi-year perspective. The most abundant macroinvertebrate taxon (i.e., Baetis) was selected for model testing. The results showed seasonal differences in the minimum ecological water requirements and optimal environmental flow. These two hydrological metrics were higher during the wet season than during the dry season. During the dry season, the minimum ecological water requirement of Baetis was 1.3 m3·s−1, and the optimal environmental flow was 1.6 m3·s−1. During the wet season, the minimum ecological water requirement of Baetis was 2.5 m3·s−1, and the optimal environmental flow was 2.6 m3·s−1. This study provides a theoretical basis for the robust management of water resources in river basins.

scholarly journals Determination of the length of Bogowonto double jetty as the river mouth stabilization

2021 ◽  
Vol 930 (1) ◽  
pp. 012027
Author(s):  
T E Bhakty ◽  
A H Swasono ◽  
N Yuwono ◽  
A F Ghalizhan ◽  
T Widyasari
Keyword(s):  
Coastal Area ◽  
River Discharge ◽  
River Flow ◽  
River Mouth ◽  
Tidal Range ◽  
Wet Season ◽  
Flow Through ◽  
The One ◽  
River Mouths

Abstract One of the problems around estuaries with the wave-dominated combination of a small tidal range and low river discharges in the dry season was the mouth closed by a sand barrier. Longshore sediment flows silted up the river mouth while river flows were insufficiently large for flushing sand barriers. When the wet season started, river discharge suddenly enlarged. Discharge can’t flow through the river mouth due to being hindered by the sand barrier. The consequence was that the hinterlands were inundated. Yogyakarta International Airport (YIA) is located in a coastal area of Kulon Progo regency, between two river mouths (Bogowonto river and Serang River). The two rivers have unstable river mouths. The double Jetty had been built at the Bogowonto river, but its condition was damaged. Meanwhile, the breakwater was constructed at the river mouth Serang and called Tanjung Adikarto. Double Jetties will be built to stabilize the Bogowonto river mouth. The purpose of this paper is to provide an overview of the length of the Jetty to be more effective in stabilizing the Bogowonto river mouth. Therefore, so that more easily opened by river flow and does not cause excessive erosion on the one side of the Jetty.

scholarly journals Seasonal variation of suspended sediment and its relationship with turbidity in Cam - Nam Trieu estuary, Hai Phong (Vietnam)

2021 ◽  
Vol 21 (3) ◽  
pp. 271-282
Author(s):  
Minh Hai Nguyen ◽  
Sylvain Ouillon ◽  
Duy Vinh Vu
Keyword(s):  
Seasonal Variation ◽  
Suspended Sediment ◽  
River Flow ◽  
Suspended Particle ◽  
Strong Dependence ◽  
Dry Season ◽  
Wet Season ◽  
Different Seasons ◽  
Spm Concentration ◽  
Suspended Particle Matter

We analyzed the seasonal variation of suspended sediment and its relationship with Turbidity in Cam - Nam Trieu estuary based on data measured during three different seasons: Early wet season (May 2015), wet season (September 2015) and dry season (January 2016). The results highlighted the seasonal variation of suspended particle matter (SPM) concentrations with river flow. The average SPM concentration was highest during the dry season, with 62.95 mg/L. They were not significantly different between the early wet and wet seasons, with 59.65 mg/L and 50.94 mg/L, respectively. This study also demonstrated a strong dependence between SPM and Turbidity in the study area. The coefficients of determination varied from 0.867 to 0.971 (linear relationship), and from 0.95 to 0.991 (proportional relationship). Therefore, turbidity can be used to estimate SPM concentration. However, this relationship changed markedly with the seasons, and hence when determining SPM concentration, seasonal factors must be considered.

scholarly journals CO<sub>2</sub> partial pressure and CO<sub>2</sub> emissions from the lower Red River (Vietnam)

2017 ◽  
Author(s):  
Thi Phuong Quynh Le ◽  
Cyril Marchand ◽  
Cuong Tu Ho ◽  
Thi Thuy Duong ◽  
Huong Thi Mai Nguyen ◽  
...  
Keyword(s):  
River Flow ◽  
Co2 Flux ◽  
River System ◽  
Dry Season ◽  
Red River ◽  
Wet Season ◽  
Night Time ◽  
Riverine Water ◽  
Air Interface ◽  
Outgassing Rate

Abstract. The Red River (Vietnam) is a good example of a South-East Asian river system, strongly affected by climate and human activities. This study aims to quantify the spatial and seasonal variability of carbon dynamic and CO2 outgassing at the water–air interface of the lower Red River system. The monitoring of water quality and CO2 emission were carried out for 24 h cyclings at the five stations during the dry and monsoon seasons. The riverine water pCO2 was supersaturated with CO2 in contrast to the atmospheric equilibrium (400 ppm), averaging about 1588.6 ± 884.6 ppm, thus resulting in a water–air CO2 flux of 26.9 ± 18.4 mmol m−2 day−1. The CO2 outgassing rate was characterized by significant spatial variations, highest at Hoa Binh station (Da River) due to the dam impoundment and the highest river flow. Surprisingly, CO2 outgassing was higher in the day time (30.4 ± 21.2 mmol m−2 day−1) than in the night time (23.3 ± 15.4 mmol m−2 day−1), probably as a result of the combined effect of higher wind speed and water temperature in the day time. Seasonal differences were also observed, higher in the wet season (30.7 ± 23.1 mmol m−2 day−1) than in the dry season (23.0 ± 12.2 mmol m−2 day−1), due to higher river discharges and higher external inputs of organic matters from watersheds. Conversely during dry season, temperature was among the main factors influencing C dynamic, with higher pCO2 and fluxes, probably as a result of increased metabolic rates.

scholarly journals Seasonal variation of oceanographic processes in Indus river estuary

MAUSAM ◽  
2021 ◽  
Vol 68 (4) ◽  
pp. 643-654
Author(s):  
NOOR AHMED KALHORO ◽  
ZHIGUO HE ◽  
DONGFENG XU ◽  
ASIF INAM ◽  
FAIZ MUHAMMAD ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
River Flow ◽  
River Estuary ◽  
Southwest Monsoon ◽  
Dry Season ◽  
Indus River ◽  
Wet Season ◽  
Salt Intrusion ◽  
Tidal Propagation ◽  
Significant Difference

Field investigations were conducted to study spatial and temporal (seasonal) variations in meteorological, hydrodynamic and hydrological variables in Indus River Estuary. The investigations were undertaken during wet, (moderate fluvial discharge), flood (highest fluvial discharge) and dry (zero fluvial discharge) seasons to obtain surface and near bed data during flood and ebb tides. Tides were semidiurnal, showing an asymmetric pattern with longer ebb tides and shorter flood tides. The hydrodynamic data revealed strong seasonal variation, the ebb velocities were significantly higher than flood current velocities during wet season, whereas a slight difference was found in current velocities during dry season, while the ebb phase lasted longer than flood during wet season; however no significant difference was observed during dry season. On the other hand during flood period the water currents were substantially higher and unidirectional related to the strong river flow. Turbidity values were considerably higher during flood season, than wet and dry seasons along the channel. However hydrological parameters such as temperature and dissolved Oxygen also revealed seasonal and spatial fluctuations, though they were within permissible range. The salinity distribution along the channel was related to the incoming river flow and tidal propagation. Higher salinity values were recorded in dry season, suggested that salinity variation at Estuary was due to salt intrusion from the North Arabian Sea, related to the absent of fluvial discharge form Indus River. Present study revealed substantial changes for hydrology and hydrodynamic conditions of the Indus River Estuary, related to the varying Indus River flow, as well as winds are another important atmospheric force in this region which enhanced the tidal forcing during southwest monsoon.

Sign in / Sign up

Export Citation Format

Share Document