scholarly journals Analisis Kebutuhan Sumur Resapan Sebagai Salah Satu Upaya Dalam Mereduksi Banjir Genangan

2019 ◽  
Vol 4 (2) ◽  
pp. 63-70
Author(s):  
Meliyana Meliyana ◽  
Ichsan Syahputra ◽  
Helwiyah Zain ◽  
Antoniadi Zal
Keyword(s):  
Elementary School ◽  
Daily Rainfall ◽  
Rain Water ◽  
Public Works ◽  
Wide Field ◽  
Runoff Coefficient ◽  
Soil Permeability ◽  
Run Off ◽  
Average Maximum ◽  
Maximum Daily Rainfall

Impermeable land in a region can not absorb rain water, so that rain water becomes run off and cause flood inundation. Absorption wells function to accommodate and absorb rain water into the soil. The purpose of this study to know the value of soil permeability, determine the dimensions and number  of absorption wells in reducing flood. The study was conducted at Elementary School 1 Pulo Ie Kabupaten Nagan Raya with area of 1500 m2 and the number of buildings as many as 4 units. The absorption well planning refers to regulation of the Minister of Public Works 11/PRT/M/2014. The data used in the planning form average daily rainfall, flood volume, soil permeability value, runoff coefficient value, depth of ground water level and wide field of cistern. The result of analysis obtained maximum daily rainfall average maximum (R) equal to 36,25 mm/day, volumes of flood (Vab)  11,552 m3, cistern area  497 m2, runoff coefficient value of 0.75 and soil permeability value (K) 0.009725 cm/sec or 8.40 m/day. Rectangular Absorption wells with depth of well (H) 1.60 meters and base well (L) width 1.20 meters. The number of absorption wells required 5 units. Thus, the flood of inundation at the Elementary School 1 Pulo Ie can be accommodated by the absorption wells, so that the flood of inundation can be overcome.       

scholarly journals Estimation of daily runoff coefficient of the pervious surfaces for the climate conditions of the city of Lviv

2020 ◽  
Vol 5 (3) ◽  
pp. 136-142
Author(s):  
Volodymyr Zhuk ◽  
◽  
Lesya Vovk ◽  
Pavlo Mysak ◽  
◽  
...  
Keyword(s):  
Return Period ◽  
Daily Rainfall ◽  
Curve Number ◽  
Runoff Coefficient ◽  
Rainfall Events ◽  
Climate Conditions ◽  
Method Of Calculation ◽  
Geological Conditions ◽  
The City ◽  
Maximum Daily Rainfall

The method of calculation of daily runoff coefficients based on the SCS USDA curve number method is presented in this paper. The calculated values ​​of daily runoff coefficients for climatic and geological conditions of the city of Lviv for maximum daily rainfall events with a return period of 0.1 – 5 years are obtained.

scholarly journals Estimating the runoff coefficient using the analytic hierarchy process

2018 ◽  
Vol 38 (1) ◽  
pp. 67-74
Author(s):  
Faiza Lallam ◽  
Abdesselam Megnounif ◽  
Abderrahman Nekkache Ghenim
Keyword(s):  
Experimental Work ◽  
Numerical Models ◽  
Daily Rainfall ◽  
Relative Importance ◽  
Runoff Coefficient ◽  
Surface Hydrology ◽  
Analytic Hierarchy ◽  
Drainage Capacity ◽  
Hierarchy Process ◽  
Maximum Daily Rainfall

AbstractThe runoff coefficient (RC) is a parameter that is very often used in surface hydrology in order to characterize the drainage capacity of a watershed. The traditional estimate of this coefficient is often made from abacuses based on 2 or 3 parameters to the maximum. In this work, three numerical models are presented. Two models are based on experimental work. The first one is based on three criteria, namely the vegetation cover, the type of soil, and the slope. The second one considers the size of the watershed, the maximum daily rainfall and the type of soil. In practice, it is not easy to estimate the coefficient of runoff by simultaneously considering the influence of several criteria. In order to overcome this problem, a third model is developed and presented; it allows capitalizing the information from the first two models mentioned above. The objective of the present work is to be able to verify the comparability of these criteria and to assess the relative importance of each of them.

Penentuan Metode Intensitas Hujan Berdasarkan Karakteristik Hujan dari Stasiun Pengamat Hujan Disekitar Kecamatan Karawang Timur

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Melisa Permatasari ◽  
M. Candra Nugraha ◽  
Etih Hartati
Keyword(s):  
Drainage System ◽  
Daily Rainfall ◽  
Intensity Analysis ◽  
Rain Intensity ◽  
Rainy Period ◽  
Discharge Plan ◽  
Calculation Results ◽  
Value Determination ◽  
Maximum Daily Rainfall ◽  
Method Approach

<p>The rain intensity is the high rainfall in unit of time. The length of rain will be reversed by the amount rain intensity. The shorter time the rain lasts, the greater of the intensity and re-period of its rain. The value of rain intensity is required to calculate the flood discharge plan on the drainage system planning area in East Karawang district. Determining the value rain intensity is required the maximum daily rainfall data obtained from the main observer stations in the Plawad station planning area. The method of determination rain intensity analysis can be done with three methods: Van Breen, Bell Tanimoto and Hasper der Weduwen. Selected method is based on the smallest deviation value. Determination deviation value is determined by comparing rain intensity value of Van Breen method, Bell Tanimoto, Hasper der Weduwen. By comparing rain intensity value of the Van Breen method, Bell Tanimoto, Hasper der Weduwen with the results of calculating three methods through the method approach Talbot, Sherman and Ishiguro. Calculation results show that the method of rain has smallest deviation standard is method Van Breen with Talbot approach for rainy period (PUH) 2, 5, 10, 25, 50 and 100 years.</p>

scholarly journals The Kruger National Park: Provision of Water for Wild Life

Oryx ◽  
1951 ◽  
Vol 1 (4) ◽  
pp. 187-189
Keyword(s):  
National Park ◽  
Dry Season ◽  
Kruger National Park ◽  
Rain Water ◽  
General Fund ◽  
Run Off ◽  
Wild Life

Two years have passed since Colonel J. A. B. Sandenbergh, the Warden of the Kruger National Park, launched a public appeal to provide water for the wild life of the park. Subscriptions were invited for two purposes: the first to provide boreholes so that in the dry season animals could find water within reach of their grazing, the second to form a general fund to build dams to retard the run-off of rain water.

scholarly journals SPATIALIZATION OF THE ANNUAL MAXIMUM DAILY RAINFALL IN SOUTHEASTERN BRAZIL

2019 ◽  
Vol 39 (1) ◽  
pp. 97-109
Author(s):  
Marcelo L. Batista ◽  
Gilberto Coelho ◽  
Carlos R. de Mello ◽  
Marcelo S. de Oliveira
Keyword(s):  
Daily Rainfall ◽  
Southeastern Brazil ◽  
Annual Maximum ◽  
Annual Maximum Daily Rainfall ◽  
Maximum Daily Rainfall

scholarly journals ANALISIS TINGGI MUKA AIR BANJIR DAS BELAWAN DENGAN MENGGUNAKAN SOFTWARE HECRAS

2018 ◽  
Vol 7 (1) ◽  
pp. 26-29
Author(s):  
Asril Zevri
Keyword(s):  
Water Level ◽  
Cross Section ◽  
Return Period ◽  
Industrial Development ◽  
Daily Rainfall ◽  
Flood Water ◽  
Flood Discharge ◽  
Flood Level ◽  
Maximum Daily Rainfall ◽  
River Cross Section

Abstract: Belawan River Basin is one of the watershed, which currently change the land use because of the increasing population and industrial development. Rainfall with high intensity can cause rapid runoff, causing flood around the plains of the river cross section. The purpose of this research is to determine the flood water level of Belawan Watershed and flood discharge return period. Scope of activity in this research is analyzing daily rainfall Belawan watershed with the flood-discharge return period. Scope of activity in this research is analyzing maximum daily rainfall Belawan Watershed, and simulating flood water level with HECRAS. The result of the study shows that the potency of Belawan watershed flood water level is caused by flood discharge at 25 to 100 years especially in the middle to downstream of river cross section that is between 0.7 m and 3.3 m. Keywords: Flood Discharge, Flood Level, Belawan Watershed, Software HECRAS. Abstrak: Daerah Aliran Sungai Belawan adalah salah satu DAS yang pada saat ini mengalami perubahan tata guna lahan seiring bertambahnya jumlah penduduk dan perkembangan industri. Curah hujan yang tinggi dapat mengakibatkan limpasan sehingga menimbulkan tinggi muka air banjir di sekitar dataran penampang sungai. Tujuan dari penelitian ini adalah untuk mensimulasi tinggi muka air banjir DAS Belawan dengan debit banjir periode kala ulangnya. Lingkup kegiatan dalam penelitian ini yaitu menganalisa curah hujan harian maksimum rata-rata DAS Belawan dan menganalisa debit banjir kala ulang 2 sampai dengan 100 tahun, mensimulasi tinggi muka air banjir dengan HECRAS. Hasil studi menunjukan potensi tinggi muka air banjir DAS Belawan terjadi akibat debit banjir periode kala ulang 25 sampai dengan 100 tahun khususnya  di bagian tengah sampai hilir penampang sungai yaitu berkisar antara 0.7 m sampai dengan 3.3 m. Kata kunci: Debit banjir, Tinggi Banjir, DAS Belawan, Software HECRAS.

scholarly journals PEMETAAN DATA RECHARGE AIR TANAH DI KABUPATEN SLEMAN BERDASARKAN DATA CURAH HUJAN

Telematika ◽  
2017 ◽  
Vol 13 (2) ◽  
pp. 93
Author(s):  
Bambang Yuwono ◽  
Awang Hendrianto Pratomo ◽  
Heru Cahya Rustamaji ◽  
Puji Pratiknyo ◽  
Mochammad Assofa Indera Jati
Keyword(s):  
Water Balance ◽  
Ground Water ◽  
Groundwater Recharge ◽  
Daily Rainfall ◽  
High Water ◽  
Factors Affecting ◽  
Living Things ◽  
Run Off ◽  
Ground Water Recharge ◽  
Water Recharge

Water is a basic need for humans and other living things. Various sources of water on this earth has formed a system of close interaction with the components of living things in it. Over the years, water resources have changed in terms of both quality and quantity. This can be due to population growth in addition to the natural changes in nature. The more narrow field of water absorption followed by high water consumption causes the supply of ground water reserves can be threatened. So, we need a mapping and ground water recharge calculations to assist in the monitoring of groundwater reserves.The method used in this research is the Water Balance (keseimbangan air)method. This method is based on any incoming rain water will be equal to the output evapotranspiration and runoff hereinafter this method is applied in the application. Factors affecting groundwater recharge the water balance method is precipitation, evapotranspiration and run off. Information og groundwater recharge is also displayed on the map using Google Map function are related to the database system to produce informative mapsCalculation of groundwater recharge is applied to the daily rainfall data input into the application which then included in the water balance equation method so it can be easy to determine the value of groundwater recharge. Groundwater recharge information can be displayed in the form of mapping, making them easier to understand visually.Based on testing, the highest recharge results of this research on the Kemput station is 1119,5 mm/year with rainfall of 2750 mm/year. Seyegan and Bronggang station is 1026,25 mm/year with rainfall of 2625 mm/year. Angin-angin and Prumpung station is 933 mm/year with rainfall of 2500 mm/year. Beran and Gemawang station is 839.5 mm/year with rainfall of 2375 mm/year. Plataran station is 808.42 mm/year with rainfall of 2333 mm/year. Godean station is 699.5 mm/year with rainfall of 2187 mm/year and the lowest at Tirto Tanjungand Santan stastion 560 mm / year with rainfall of 2000 mm / year.

Estimation and dimulation of sheet run-off

Soil Research ◽  
1976 ◽  
Vol 14 (2) ◽  
pp. 129 ◽  
Author(s):  
JR Ive ◽  
CW Rose ◽  
BH Wall ◽  
BWR Torssell
Keyword(s):  
Soil Water ◽  
Dry Matter ◽  
Daily Rainfall ◽  
Rainfall Events ◽  
Run Off ◽  
Townsville Stylo ◽  
Experimental Values ◽  
Water Values ◽  
Soil Water Profiles ◽  
Surface Sheet

Sheet run-off was estimated for a Townsville stylo-annual grass pasture with 1% slope in the northern Australian monsoonal region by using neutron hydrometry supplemented by gravimetric soil sampling, both carefully timed with respect to the rainfall event. The technique is applicable to run-off and run-on situations. An empirical model was developed and incorporated into a water balance routine in an existing growth model. It relates surface sheet run-off to the soil antecedent water content (top 20 cm) and the standard daily rainfall total; the coefficients of the empirical functions are site specific. For the rainfall events studied, run-off was 37 � 12% of the rainfall. The soil water values simulated with the run-off model included were significantly closer to the experimental values than when run-off was assumed to be zero. This improvement in simulation of soil water profiles was consistent with an improvement in subsequent dry matter simulation.

scholarly journals Maximum daily rainfall in South Korea

2007 ◽  
Vol 116 (4) ◽  
pp. 311-320 ◽  
Author(s):  
Saralees Nadarajah ◽  
Dongseok Choi
Keyword(s):  
South Korea ◽  
Daily Rainfall ◽  
Maximum Daily Rainfall
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