scholarly journals Pengendalian Run-Off Dengan Sumur Resapan Di Kawasan Kampus Universitas Andalas Limau Manis Kota Padang (Studi Kasus Politeknik Negeri Padang)

2019 ◽  
Vol 15 (1) ◽  
pp. 65
Author(s):  
Tri Intan Putri ◽  
Elvi Roza Syofyan ◽  
Revalin Herdianto ◽  
Prestyo Anggara Lubis
Keyword(s):  
Land Use ◽  
Field Testing ◽  
Infiltration Rate ◽  
Primary Data ◽  
Chi Square ◽  
Run Off ◽  
Pearson Type ◽  
Catchment Areas ◽  
Log Normal ◽  
Runoff Discharge

Changing the land use of the Limau Manis area from the forest to the campus area can directly reduce water catchment areas, where water cannot soak into the ground, so that water reserves in the ground become reduced and run-off increases. To overcome this problem, an environmental friendly run-off control study was carried out, namely with recharge wells. The purpose of this study was (1) to find out the storage capacity of each infiltration well in the Padang State Polytechnic Campus, (2) to find out the number of infiltration wells to reduce run-off in the Padang State Polytechnic Campus, and (3) to know the effect of levels ground water to changes in infiltration rate. The method used in this study is land use analysis using QGIS. Analysis of rainfall using the Normal, Log Normal, Gumbel and Log Pearson Type III methods. Test the validity and suitability of the distribution with the Chi-Square and Smirnov-Kolmogorof tests. Run-off discharge analysis is calculated using the Rational method. Primary data were obtained by field testing and infiltration well making. The results of this study were (1) the capacity (volume) of storage in each infiltration well was different, where the largest infiltration well volume was 4.6 m3 while the smallest infiltration well volume was 3.1 m3, (2) the number of infiltration wells can reduce run-off varies, with 186 units of infiltration wells reducing by 34.2% runoff discharge to 65.8%, 113 infiltration well units reducing by 20.4% runoff discharge to 79.6%, 60 infiltration well units reducing by 10.8% runoff discharge to 89.2%, and 31 infiltration well units reduce by 5.5% runoff discharge to 94.5%, and (3) changes in groundwater content from 30.6% -50.6% cause a decrease in infiltration rate of 0.1 cm / minute.

scholarly journals Distribuições de probabilidade para séries históricas mensais de pressão atmosférica no município de Mossoró-RN

2016 ◽  
Vol 11 (2) ◽  
pp. 135
Author(s):  
Janilson Pinheiro de Assis ◽  
Roberto Pequeno de Sousa ◽  
Paulo César Ferreira Linhares ◽  
Thiago Alves Pimenta ◽  
Elcimar Lopes da Silva
Keyword(s):  
Atmospheric Pressure ◽  
Probability Distributions ◽  
Probability Density Distribution ◽  
Chi Square ◽  
Pearson Type ◽  
Kolmogorov Smirnov ◽  
Anderson Darling ◽  
Log Normal ◽  
Von Mises ◽  
Cramer Von Mises

<p>Objetivou-se verificar o ajuste de 12 séries históricas de pressão atmosférica mensal (milibar) no período de 1970 a2007, em Mossoró, RN, à sete modelos de distribuição densidade de probabilidade Normal, Log-Normal, Beta, Gama, Log-Pearson (Tipo III), Gumbel e Weibull, através dos testes Kolmogorov-Smirnov, Qui-Quadrado, Cramer Von-Mises, Anderson Darling e Kuiper a 10 % de probabilidade e utilizando-se o Logaritmo da Máxima Verossimilhança. Verificou-se a superioridade do ajustamento da distribuição de probabilidade Normal, quando comparada com as outras seis distribuições. No geral, os critérios de ajuste concordaram com a aceitação da hipótese H<sub>0</sub>, no entanto, deve-se salientar que o teste de Kolmogorov-Smirnov apresenta um nível de aprovação de uma distribuição sob teste muito elevado, gerando insegurança aos critérios do teste, porém, como neste estudo os dados são aproximadamente simétricos, esse é o mais recomendado.</p><p align="center"><strong><em>Probability distributions for historic series of monthly atmospheric pressure </em></strong><strong><em>in city</em></strong><strong><em> of Mossoró-RN</em></strong></p><p><strong>Abstract</strong><strong>: </strong>The aim of this study was to determine the set of 12 time series of monthly atmospheric pressure (millibars) in the period 1970-2007, in Natal, RN, the seven models of the probability density distribution Normal, Log-Normal, Beta, Gamma, Log -Pearson (Type III), Gumbel and Weibull, through the Kolmogorov-Smirnov tests, Chi-Square, Cramer-von Mises, Anderson Darling and Kuiper 10 probability and using the logarithm of the maximum likelihood. It is the superiority of adjusting the normal probability distribution compared to the other six distributions. Overall, the fit criteria agreed with the acceptance of the hypothesis, however, it should be noted that the Kolmogorov-Smirnov test shows a level of approval of a distribution under test very high, which creates some uncertainty to the criteria of test, but in this study as the data are roughly symmetrical it is the most recommended.</p>

scholarly journals Seasonal variability of nitrate flux in the Northern part of Karangbolong Karst Aquifer, Central Java

2020 ◽  
Vol 200 ◽  
pp. 06009
Author(s):  
Elisabeth Supi Astuti ◽  
Eko Haryono
Keyword(s):  
Land Use ◽  
Catchment Area ◽  
Agricultural Land ◽  
Karst Aquifer ◽  
Karst Area ◽  
Primary Data ◽  
Topographic Map ◽  
Dry Land ◽  
Washing Process ◽  
Catchment Areas

Kalisirah Springs and Jumbleng Spring are located in the northern part of Karangbolong Karst Area, Kebumen Regency. Tracer tests for underground rivers and field surveys indicate that the catchment areas of these two karst springs have the dominant land use of dry land farm and plantation. The condition of the catchment area will affect the chemical content of water resources in karst aquifers. Dry land farm and plantation use fertilizer in the process of planting, but in practice, there is nitrogen lost due to the washing process by rainwater. Karst landforms also have cavities and fissures that allow applied fertilizer to enter the karstic aquifer directly. This study aims to determine the nitrogen flux fluctuations in the form of nitrate (N) in Kalisirah Springs and Jumbleng Springs along with their relationship with discharge and rainfall. The data used in this study were primary data, which included data of the water level, rainfall, water chemistry samples, and the agricultural planting calendar. The N content was analyzed using hydrograph to determine the response of N flux to the discharge. Recording the amount of N used in agricultural activities in the catchment area was conducted by calculating the area of agricultural land use using Topographic Map of Indonesia, and the triangulation method was used to determine fertilizer characteristics in the catchment area. Kalisirah catchment area lost 56.09 % N, while the Jumbleng catchment area lost 57.53 % N. The extent of this loss is influenced by land use conditions which will have implications for the number and frequency of fertilization.

scholarly journals PERENCANAAN SALURAN TERTUTUP DRAINASE BAWAH TANAH DI JALAN PRAJURIT SATU MERAUKE.

2018 ◽  
Vol 1 (1) ◽  
pp. 59-69
Author(s):  
Siti Fatimah Nelson ◽  
Abner Doloksaribu ◽  
Budi Doloksaribu
Keyword(s):  
Chi Square ◽  
Type Iii ◽  
Pearson Type ◽  
Log Normal

Sistim drainase yang ada di jalan Prajurit Satu pada saat ini kurang begitu efektif bekerja. Genangan air yang sering terjadi di jalan Prajurit diakibatkan oleh air hujan dan air buangan rumah tangga yang masuk ke drainase, sehingga tujuan dari penelitian ini adalah mengetahui debit banjir dan kapasitas saluran serta merencanakan saluran tertutup yang sekaligus berfungsi sebagai bahu jalan. Analisis data curah hujan menggunakan metode Gumbel, Log Pearson Type III, Log Normal dan Normal. Pengujian metode di atas dihitung menggunakan Chi Square dan Smirnov Kolmogorof. Hasil perhitungan diperoleh debit saluran existing 0,031 m3/detik lebih kecil dari pada debit banjir 0,671 m3/detik, sehingga perlu direncanakan saluran drainase baru menggunakan penampang persegi dengan lebar dasar saluran (b) = 150 cm, kedalaman aliran (h) = 150 cm, tinggi jagaan (w) = 30 cm dan diperoleh debit (Q) = 0,842 m3/detik. Penutup drainase menggunakan tulangan pokok (As) = D13 – 150, tulangan bagi (Asb) = D10 – 175 dan tebal plat 200 mm.  Kata  kunci : Saluran tertutup, Debit banjir, Kapasitas saluran.

scholarly journals ANALISIS PERUBAHAN BILANGAN KURVA ALIRAN PERMUKAAN PADA BEBERAPA SKENARIO PEMANFAATAN LAHAN DI SUB DAS LATOMA, DAS KONAWEHA, SULAWESI TENGGARA

PERENNIAL ◽  
2007 ◽  
Vol 3 (1) ◽  
pp. 19
Author(s):  
Miranda R. Malamassam ◽  
Sandra E. Pakasi
Keyword(s):  
Land Use ◽  
Geographical Information Systems ◽  
System Analysis ◽  
Curve Number ◽  
Infiltration Rate ◽  
Geographical Information ◽  
Domestic Water ◽  
Land Use Pattern ◽  
Watershed Land Use ◽  
Run Off

Sub watershed of Latoma has to be considered as an area of the important regions in South East Sulawesi, because it takes a great responsibility as a water supplier in Konaweha watershed. Konaweha watershed is a source of irrigation and domestic water for Kolaka Regency, Konawe Regency, South Konawe Regency and Kendari Municipality which has been recently in a critical condition. For this reason, it should be well managed. This study was implemented with the aim of establishing model of land use in Latoma sub watershed that can preserve the land and water resources. The method employs a system analysis with simulation technique by using the Run-off Curve Number (CN) model based on Geographical Information Systems (GIS). The result of the research revealed that the run-off curve number is 70,34. It showed that maximum potential water retention or infiltration rate is 107,10 mm. Restructuring of land use pattern should be done to improve the condition of the area to achieve a sustainability objectives. Keywords : Watershed, land use, run-off curve number (CN), GIS

Analisis Volume Limpasan dengan Metode Green-Ampt

2019 ◽  
Vol 2 (2) ◽  
pp. 165
Author(s):  
Rena Sempana Wahyu Putri ◽  
Dian Sestining Ayu
Keyword(s):  
Land Use ◽  
Negative Impact ◽  
Infiltration Rate ◽  
Social Needs ◽  
Flood Event ◽  
Soil Parameters ◽  
Land Conversion ◽  
Soil Infiltration ◽  
Moisture Condition ◽  
Run Off

The development of modern era involves the economic, industrial and population growth and also increase of the social needs which cause the increase of the land needs. Land conversion which happens today has a negative impact on the environment and can damage the potency of the land use itself. One of the negative impacts of the land use conversion which are unwell planned, unwell patterned and not aware with the environment is the increased of the run-off volume due to the decrease the ability of the soil infiltration. If there is no further management of the land conversion, it will cause the increase of the annual peak discharge and has the potential to cause the flood. Green-Ampt is one of the method that can be used to analyze run-off volume by estimating capacity and infiltration rate. In Green-Ampt Method there are some parameters that affect the result of the analysis which are related to vegetal cover and soil parameters such as suction head, hydraulic conductivity, initial moisture, and saturated moisture condition of the soil. The aims of this study are to give the additional information and knowledge related to the run-off volume potency in the study area which has been conducted using Green-Ampt Method for the analysis. Hope the result can be used as the reference in management of water resources potency especially in study area, there are Sub Watershed Pogung, Kaloran and Papringan. From the analysis it is known that there is a different result between observed run-off volume and run-off volume by GreenAmpt Method. The difference of the result can occur because of the different intepretation data on both methods. Analysis by observed run-off volume shows that there are run-off for all of the flood event, while the analysis by Green-Ampt Method shows that run-off only occured in one flood event.

scholarly journals PEMANFAATAN LAHAN DI KECAMATAN RATAHAN, KECAMATAN RATAHAN TIMUR DAN KECAMATAN PASAN KABUPATEN MINAHASA TENGGARA BERDASARKAN ZONA AGROEKOLOGI DENGAN MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS

2019 ◽  
Vol 15 (2) ◽  
pp. 225
Author(s):  
Astri Vandalia Elisabeth Naray ◽  
Johan Alexander Rombang ◽  
Jaelani ., Husain
Keyword(s):  
Land Use ◽  
Quantitative Research ◽  
Spatial Information ◽  
Secondary Data ◽  
Primary Data ◽  
Climate Type ◽  
North Sulawesi ◽  
Catchment Areas ◽  
Agricultural Potential ◽  
Agroecological Zone

This study aims to determine the direction of land use in Ratahan Subdistrict, Ratahan Timur and Pasan, Southeast Minahasa Regency, based on the Agroecology Zone using the application of Geographic Information Systems (GIS). The type of research used in this study is quantitative research with a method of data and spatial interpretation. The types of data used in the study are primary data and secondary data. The data generated is arranged in the form of information and spatial. The study was conducted in 3 (three) subdistricts namely Ratahan Subdistrict, Ratahan Timur Subdistrict and Pasan Subdistrict, Southeast Minahasa Regency, North Sulawesi Province, which were included in 1 (one) sub-district, Ratahan Sub-district. While the implementation time in April to June 2018. Analysis of the data used in this study where the resulting data is arranged in the form of data and spatial information, then compiling and analyzing data using the Quantum ArcGIS version 10.2 program application. Besides that, biophysical data analysis and agricultural potential data will be carried out. The results of the study based on the concept of land use in Ratahan Subdistrict, East Ratahan and Pasan results of agroecological zone maps using GIS obtained 32 zones from the results of analysis of soil type and slope data and climate type. The results of the analysis of the allocation in accordance with the conditions of land use (land cover) as well as the output of the map of Southeast Minahasa Regency RTRW space map in 2013, the agroecological zone can be divided into two main uses, namely protected zone and cultivation zone. In protected areas recommended in protected forests, water catchment areas, river borders and lake bordersaround the springs. Whereas in the cultivation area it is recommended to use land for agroforesty, rice fields, settlements, mixed farming, conservation settlements, plantations and production forest.*eprm*

scholarly journals Analisa Penerapan Resapan Biopori Pada Kawasan Rawan Banjir Di Kecamatan Telaga Biru

2018 ◽  
Vol 1 (1) ◽  
pp. 33
Author(s):  
Ilyas Ichsan ◽  
Zulkifli S. Hulalata
Keyword(s):  
Surface Runoff ◽  
Quantitative Methods ◽  
Secondary Data ◽  
Infiltration Rate ◽  
Storm Water ◽  
Primary Data ◽  
Water Runoff ◽  
Storm Water Runoff ◽  
Runoff Analysis ◽  
Runoff Discharge

Surface Runoff occurs due to high rainfall that falls in an area that is able to caused flooding. Infiltration Biopori Technology serves to reduce storm water runoff is to increase the water absorbing soil thus reducing surface runoff that often causes floods. This research aim was to get the value of infiltration without biopori infiltration and infiltration with infiltration biopori, as well as obtaining the presentation of discharge runoff can be reduced by 1 piece infiltration biopori on a plot of land with an area of 100 m2. The research methods used quantitative methods. Primary data obtained from testing on-site infiltration studies used Single Tool Infiltrometer Ring with a diameter of 25 cm, were analyzed used the method of Horton Curve. Secondary data, precipitation last 10 years from the year 2006 to 2015 obtained from BMKG Djalaludin Gorontalo Airport consists of three stations that BPP-Tapa, Talumelito, Slamet Djalaludin Gorontalo, then analyzed used rational methods to obtain discharge of the runoff. Analysis of the results obtained, infiltration without absorption biopori was 4.5 cm / hour, once created biopori infiltration infiltration rate rose to 38.1 cm / hour, and 1 absorption biopori on a plot of land with an area of 100 m2 can reduce runoff discharge at 10.82%

PERSEPSI PETERNAK PADA KEPEMIMPINAN PENDAMPING DAN HUBUNGANNYA DENGAN PRODUKTIVITAS USAHA TERNAK DI PAGUYUBAN AL-AWWALIYAH, PASIRWANGI, GARUT, JAWA BARAT

2019 ◽  
Vol 12 (1) ◽  
pp. 42-51
Author(s):  
Dwi Indah Sulistiani ◽  
Ujang Maman ◽  
Junaidi J
Keyword(s):  
Data Analysis ◽  
Secondary Data ◽  
Primary Data ◽  
Leadership Qualities ◽  
Chi Square ◽  
Education Experience ◽  
Spss Software ◽  
Chi Square Analysis ◽  
And Behavior ◽  
The Relationship

Objective of this research; 1) determine the perception of ranchers against the properties and behavior of the leadership of the companion in the Society of Al-Awwaliyah 2) analyze the relationship between productivity breeder with productivity of livestock in the Society of Al-Awwaliyah 3) identify the relationship perceptions of ranchers against the leadership companion with productivity of livestock in the Society of Al-Awwaliyah , The data used in this study are primary and secondary data. Primary data were obtained from questionnaires which stem from ranchers while secondary data sourced from literature in the form of books and articles. Data processing was performed using Chi-square analysis using SPSS software version 21. One of the factors relating to the productivity of ranchers is the perception of ranchers against the leadership of their companion. Leadership companion views of the nature and behavior of which is owned by a companion. Productivity ranchers indirectly related to the productivity of the cattle business. Characteristics breeder visits of age, years of education, experience ranchers, and businesses in addition to ranchers. The results of data analysis showed that there is a significant relationship between business other than ranchers with ranchers productivity. The relationship between the perception of the nature of the companion breeder with productivity ranchers produce Pearson Chi-Square value is 9.751 and Asymp. Sig. (2-sided) of 0.002. This is due to interest ranchers against leadership qualities possessed by a companion who produce prolific ranchers. Ranchers consider that a companion of his leadership qualities are ideal as a companion.

Prediction of Haemoglobin Level by Some Probability Distribution

2020 ◽  
Vol 9 (1) ◽  
pp. 84-88
Author(s):  
Govinda Prasad Dhungana ◽  
Laxmi Prasad Sapkota
Keyword(s):  
Probability Distribution ◽  
Normal Distribution ◽  
Goodness Of Fit ◽  
Continuous Variable ◽  
Hemoglobin Level ◽  
Chi Square ◽  
Chi Square Test ◽  
Log Normal ◽  
Two Parameters ◽  
Best Fit

 Hemoglobin level is a continuous variable. So, it follows some theoretical probability distribution Normal, Log-normal, Gamma and Weibull distribution having two parameters. There is low variation in observed and expected frequency of Normal distribution in bar diagram. Similarly, calculated value of chi-square test (goodness of fit) is observed which is lower in Normal distribution. Furthermore, plot of PDFof Normal distribution covers larger area of histogram than all of other distribution. Hence Normal distribution is the best fit to predict the hemoglobin level in future.

scholarly journals The Impact of Dynamic Capabilities on Sustainable Competitive Advantage in the Pharmaceutical Sector in Egypt

2017 ◽  
Vol 6 (2) ◽  
pp. 1
Author(s):  
Albert Naiem Naguib ◽  
Eahab Elsaid ◽  
Abdel Moneim Elsaid
Keyword(s):  
Competitive Advantage ◽  
Dynamic Capabilities ◽  
Secondary Data ◽  
Primary Data ◽  
Sustainable Competitive Advantage ◽  
Firm Characteristics ◽  
Pharmaceutical Sector ◽  
Chi Square ◽  
Pharmaceutical Firms ◽  
The Impact

This study examines the relationship between dynamic capabilities (experience, routine, skills, firm characteristics, knowledge and technology) and competitive advantage sustainability in the Egyptian pharmaceutical sector. The data was collected using primary and secondary data sources. Primary data was collected from questionnaires distributed to 160 top managers in 20 pharmaceutical firms. The secondary data about pharmaceutical firms like rankings, revenues and market share was collected from external sources such as Intercontinental Marketing Service (IMS). The questionnaires examine six independent variables based on a five-scale Likert scale. The methodology used in the study is non-probability sampling (judgmental sampling), Cronbach’s alpha reliability coefficient and Chi-square tests. The results support the notion that there is a significant relationship between four of the six dynamic capabilities (experience, skills, firm characteristics and knowledge) and the competitive advantage sustainability for pharmaceutical firms in Egypt. Designing the questionnaire and formulating the questions to target the required field was challenging, given that the topic is dynamic and the business scene in Egypt has witnessed drastic political changes since January 2011. The study should assist pharmaceutical companies in Egypt in directing their investments properly and in determining the weaknesses in their dynamic capabilities that need to be addressed.

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