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 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 Alih Fungsi Lahan dan Curah Hujan terhadap Perubahan Hidrologi Sub Das Samin

2017 ◽  
Vol 1 (1) ◽  
pp. 13
Author(s):  
Nining Rahayu ◽  
Sutarno Sutarno ◽  
Komariah Komariah
Keyword(s):  
Land Use ◽  
Statistical Analysis ◽  
Correlation Analysis ◽  
Secondary Data ◽  
Land Conversion ◽  
Forest Land ◽  
Run Off ◽  
Study Population ◽  
Annual Discharge ◽  
Annual Charge

<p>Samin sub-watershed is located in the district of Karanganyar and Sukoharjo regency. Every year an increasing number of people in Samin sub-watershed can inflict problems such as the seizure of land use and the amount of available water resources. This study purpose to analyzed the influence of land conversion and rainfall to hydrology conditions Samin sub-watershed in 2005-2015. This research used descriptive exploration method. The study population was the whole unit of land use in the Samin sub-watershed. Data collection techniques used collection of  secondary data from  BPS  Karanganyar-Sukoharjo regency and  watering hall.  Data  were analyzed using correlation analysis of land use and rainfall on hydrology conditions Samin sub-watershed. The results showed that the wetland and forest land decreased by an average of 44,76 ha-1year and 102,5 ha-1year. Residential land, fields and plantations increased by an average of 26,8ha-1year, 54,07ha-1year and 26,82ha-1year. In period 2005-2010 and 2011-2015, Samin sub-watershed has declined average on annual charge (-3.117,42 m3/second), value of coefficient run-off (-0,11), sedimentation (-0,01 mm) and increase average on value of  coefficient of river regime (+91,02) and CVcharge  (+0,35). Results of statistical analysis of correlation showed that, decline in wetland, forest and increased fields affect the increase coefficient of river regime. Decreased forest land also increased of fields land and plantations affect the  increase of  Coefficients of  Variants (CVcharge). Decreased forest land  affects decreased run-off coefficient, sedimentation and annual discharge.</p>

scholarly journals Assessing the effect of soil parameterization in land use change impact modeling

2021 ◽  
Vol 384 ◽  
pp. 275-281
Author(s):  
Yacouba Yira ◽  
Aymar Yaovi Bossa ◽  
Ernest Amoussou ◽  
Djigbo Félicien Badou ◽  
Jean Hounkpè ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Signal To Noise Ratio ◽  
Infiltration Rate ◽  
Quality Measures ◽  
Soil Infiltration ◽  
Soil Map ◽  
Change Impact ◽  
The Impact ◽  
Soil Infiltration Rate

Abstract. This study addresses the importance of integrating the effect of land use on soil infiltration rate into land use change impact modeling. Based on a validated version 9.05.04 of the Water balance Simulation Model-WaSiM (statistical quality measures > 0.7), and field measurement of the infiltration rate under cropland and fallow, sixteen model simulations were performed. The impact of land use change is computed comparing LULC status of years 1990 and 2013. The effect of soil parameterization is computed using a refined soil map integrating land use change impact of soil infiltration rate and a classic soil map not considering this interaction. The results show differences in model results as an effect of soil parameterization approaches, indicating that the model is sensitive to the integration of LULC related effects on soil hydraulic conductivity. These differences are more pronounced with increasing modeling time steps (24 and 28 h). The signal-to-noise-ratio indicates that, results achieved in LULC impact assessment with a classic and a refined soil parameterization are very comparable except for interflow.

scholarly journals Estimation of Green Land to Urban Change Based on Cellular Automata (CA) Method in Singaraja City and its Surrounding Areas

2018 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Nyoman Arto Suprapto ◽  
Takahiro Osawa ◽  
I Dewa Nyoman Nurweda Putra
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Urban Areas ◽  
Negative Impact ◽  
Positive Impact ◽  
Landsat 8 ◽  
Land Conversion ◽  
Landsat 7 ◽  
Surrounding Areas ◽  
Green Land

Singaraja city is the second largest city in Bali which have a fairly rapid growth. Growth and development of the region in urban areas of Singaraja give the positive impact on the economy of the community but also give the negative impact on the environment. Land use change and land conversion into one of the negative issues of the development of urban areas in Singaraja. This study intends to calculate the amount of land conversion occur on the green land into urban areas within 14 years (2001-2015) and predict land use change in 2020 and 2025 in Singaraja City and Its Sorrounding Areas. Landsat 7 and Landsat 8 imageries were used to determine the land use map. Land use map obtained through the process of image classification using supervised method then verified using data field. Land use maps in 2015 and 2001 used to obtain the amount of change of urban areas and green land during the period of 14 years. This results show increasing amount of urban areas as 11,37% (3.153,74 ha) whereas green land decreased by 11,17% (3.097,68 ha). Land use change was predicted by Markov method. The projection results show the amount of urban areas in 2020 was 27,40% (7.598,45 ha) and 35,97% (9.974,55 ha) in 2025. The results obtained with this prediction accuracy rate of 0.91.

scholarly journals Influence of soil parameters on the skewness coefficient of the annual maximum flood peaks

2011 ◽  
Vol 8 (3) ◽  
pp. 5559-5604 ◽  
Author(s):  
A. Gioia ◽  
V. Iacobellis ◽  
S. Manfreda ◽  
M. Fiorentino
Keyword(s):  
Probabilistic Models ◽  
Probability Distributions ◽  
Source Area ◽  
Infiltration Rate ◽  
Soil Parameters ◽  
Physical Factors ◽  
Soil Infiltration ◽  
Infiltration Capacity ◽  
Flood Prediction ◽  
Skewness Coefficient

Abstract. Understanding the spatial variability of key parameters of flood probability distributions represents a strategy to provide insights on hydrologic similarity and building probabilistic models able to reduce the uncertainty in flood prediction in ungauged basins. In this work, we exploited the theoretically derived distribution of floods TCIF (Gioia et al., 2008), based on two different threshold mechanisms associated respectively to ordinary and extraordinary events. The model is based on the hypotheses that ordinary floods are generally due to rainfall events exceeding a threshold infiltration rate in a small source area, while the so-called outlier events, responsible of the high skewness of flood distributions, are triggered when severe rainfalls exceed a storage threshold over a large portion of the basin. Within this scheme, a sensitivity analysis was performed in order to analyze the effects of climatic and geomorphologic parameters on the skewness coefficient. In particular, the analysis was conducted investigating the influence on flood distribution of physical factors such as rainfall intensity, soil infiltration capacity, and basin area, in order to provide insights in catchment classification and process conceptualization.

scholarly journals PERAN DESA PAKRAMAN DALAM PEMBENTUKAN PERAREM TERKAIT PENYELESAIAN KONFLIK ALIH FUNGSI LAHAN (Studi Kasus Di Desa Pakraman Tunjuk, Kabupaten Tabanan)

2016 ◽  
Vol 5 (3) ◽  
pp. 435
Author(s):  
Ni Made Lidia Lestari Karlina Dewi
Keyword(s):  
Land Use ◽  
Research Methods ◽  
Empirical Research ◽  
Negative Impact ◽  
Land Conversion ◽  
Empirical Research Methods ◽  
The Village

This paper discusses the role in the formation perarem Pakraman related to the settlement of the conflict over the land in the village of Pakraman Show which is located in Tabanan, where land use has a negative impact even cause conflicts between village manners and developers. Issues discussed in this paper is how the role Pakraman role in the formation of perarem related to the settlement of the conflict over the land. Discussion of this paper uses empirical research methods for assessing and analyzing the data obtained in the field. Land conversion in Pakraman Show cause conflict between village manners and developers so as to stop the conflict, prajuru village did Paruman and formed perarem which has kekutan law similar to awig awig, which perarem it provides for the prohibition of developers to enter the territory of the village Pakraman Show.Karya ilmiah ini membahas tentang peran desa pakraman dalam pembentukan perarem terkait dengan penyelesaian konflik alih fungsi lahan di Desa Pakraman Tunjuk yang terletak di Kabupaten Tabanan, di mana alih fungsi lahan tersebut memiliki dampak negatif bahkan menyebabkan konflik antara krama desa dan pengembang. Masalah yang dibahas dalam karya ilmiah ini yaitu bagaimana peran peran desa pakraman dalam pembentukan perarem terkait dengan penyelesaian konflik alih fungsi lahan. Pembahasan karya ilmiah ini menggunakan metode penelitian empiris karena mengkaji dan menganalisa data yang didapatkan di lapangan. Alih fungsi lahan di Desa Pakraman Tunjuk menimbulkan konflik antara krama desa dan pengembang sehingga untuk menghentikan konflik tersebut, prajuru desa melakukan paruman dan membentuk perarem yang memiliki kekuatan hukum yang sama dengan awig-awig, yang mana perarem tersebut mengatur tentang larangan pengembang untuk memasuki wilayah Desa Pakraman Tunjuk.

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

scholarly journals Development of Fragility Curves for Piping and Slope Stability of River Levees

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 738
Author(s):  
Nicola Rossi ◽  
Mario Bačić ◽  
Meho Saša Kovačević ◽  
Lovorka Librić
Keyword(s):  
Slope Stability ◽  
Fragility Curves ◽  
Safety Margin ◽  
Water Levels ◽  
Flood Event ◽  
Soil Parameters ◽  
Design Code ◽  
A Site ◽  
Insight Into

The design code Eurocode 7 relies on semi-probabilistic calculation procedures, through utilization of the soil parameters obtained by in situ and laboratory tests, or by the means of transformation models. To reach a prescribed safety margin, the inherent soil parameter variability is accounted for through the application of partial factors to either soil parameters directly or to the resistance. However, considering several sources of geotechnical uncertainty, including the inherent soil variability, measurement error and transformation uncertainty, full probabilistic analyses should be implemented to directly consider the site-specific variability. This paper presents the procedure of developing fragility curves for levee slope stability and piping as failure mechanisms that lead to larger breaches, where a direct influence of the flood event intensity on the probability of failure is calculated. A range of fragility curve sets is presented, considering the variability of levee material properties and varying durations of the flood event, thus providing crucial insight into the vulnerability of the levee exposed to rising water levels. The procedure is applied to the River Drava levee, a site which has shown a continuous trend of increased water levels in recent years.

scholarly journals Carabid Beetle (Coleoptera: Carabidae) Response to Soil Properties of Urban Wastelands in Warsaw, Poland

2020 ◽  
Vol 12 (24) ◽  
pp. 10673
Author(s):  
Axel Schwerk ◽  
Marzena Wińska-Krysiak ◽  
Arkadiusz Przybysz ◽  
Ewa Zaraś-Januszkiewicz ◽  
Piotr Sikorski
Keyword(s):  
Negative Impact ◽  
Carabid Beetle ◽  
Carabid Beetles ◽  
Soil Parameters ◽  
City Development ◽  
Space Management ◽  
Trade Offs ◽  
Beetle Assemblages ◽  
Trace Element Contamination ◽  
The One

Urban wasteland is of special interest to city planners. However, to integrate such areas into city space management with consideration of nature conservation aspects, a sound assessment of their ecological potential is necessary. The aim of this paper was to analyze whether carabid beetle assemblages of the wastelands are affected by soil parameters, particularly trace element contamination. Therefore, we studied the carabid fauna in relation to selected soil parameters on 56 sampling plots situated in 24 wastelands located in the city of Warsaw (Poland). The results have confirmed our assumptions that the number of species, as well as the number of individual carabid beetles, are negatively affected by an increasing amount of pollutants in the soil. Particularly, the trace elements Pb, Cu, and Cd showed a significantly negative impact. The results are of value when it comes to the use of urban wastelands in the context of sustainable city development. Future use of urban wastelands will be faced with trade-offs between the use for public interests (e.g., housing space) and ecological interests. Phytoremediation and entomoremediation may be included in decontamination measures. The results of studies, such as the one conducted by us, may help to select the respective wastelands for certain purposes.

Sign in / Sign up

Export Citation Format

Share Document