scholarly journals PENGARUH SEDIMEN TERHADAP UMUR LAYANAN PADA TAMPUNGAN MATI (DEAD STORAGE) WADUK KRISAK DI WONOGIRI DENGAN METODE USLE (UNIVERSAL SOIL LOSSES EQUATION)

2019 ◽  
Vol 7 (4) ◽  
Author(s):  
Fakhrizal Arifandi ◽  
Cahyono Ikhsan
Keyword(s):  
Dead Storage ◽  
Soil Losses

<p>Salah satu masalah dalam pengelolaan waduk adalah sedimentasi. Sedimen diakibatkan dari erosi, angkutan sedimen bertambah maka sedimen akan mengendap di dalam waduk dan kapasitas tampungan mati waduk akan berkurang. Kemudian umur waduk tersebut akan mengalami percepatan pengurangan layanannya. Daerah Aliran Sungai (DAS) Bengawan Solo merupakan salah satu DAS di Indonesia yang segera memerlukan penanganan (Joko Sutrisno, 2011). Kondisi daerah aliran sungainya Bengawan Solo sudah memprihatinkan, terutama besarnya laju erosi yang cukup tinggi serta produktivitas lahan yang dinilai semakin menurun. SUB-DAS Jlantah yang berlokasi di muara Sungai Krisak berada di dekat tempat pengambilan air Waduk Krisak, dinilai menyumbang sedimentasi terbesar yang akan sangat mengganggu operasional waduk. Selain menyebabkan sedimentasi, erosi juga akan menyebabkan berkurangnya ketebalan tanah dan berkurangnya tingkat kesuburan tanah di wilayah hulu. Tujuan dari penelitian ini adalah mendapatkan pengaruh sedimen terhadap umur waduk pada tampungan mati menggunakan metode USLE. Metode penelitian ini menggunakan metode deskriptif kuantitatif dan secara garis besar dibagi menjadi 3 tahapan pelaksanaan sebagai berikut : pengumpulan data, analisa data, kesimpulan dan saran. Data yang digunakan berupa data curah hujan jangka waktu 10 tahun antara tahun 2009 sampai 2018. Peta yang digunakan adalah Peta Tanah, Peta Topografi dan Peta Tata Guna Lahan. Pengumpulan data dilakukan melalui studi literatur serta menggunakan data yang dimiliki Balai Penelitian Teknologi Kehutanan Pengelolaan Daerah Aliran Sungai Surakarta, Balai Besar Wilayah Sungai Begawan Solo dan Jasa Tirta Wonogiri. Hasil analisis berdasarkan prediksi erosi USLE diperoleh 2.437.833,4990 ton/tahun dengan volume yang masuk pada tampungan sedimen Waduk Krisak yaitu 816.147,8068 m3/tahun dengan umur layanan 4,6 tahun.</p>

Spatially distributed soil losses and sediment yield: a case study of Langat watershed, Selangor, Malaysia

2021 ◽  
pp. 104742
Author(s):  
Noor Fadzilah Yusof ◽  
Tukimat Lihan ◽  
Wan Mohd Razi Idris ◽  
Zulfahmi Ali Rahman ◽  
Muzneena Ahmad Mustapha ◽  
...  
Keyword(s):  
Sediment Yield ◽  
Spatially Distributed ◽  
Soil Losses

scholarly journals Soil Erosion Estimates in Arid Region: A Case Study of the Koutine Catchment, Southeastern Tunisia

2021 ◽  
Vol 11 (15) ◽  
pp. 6763
Author(s):  
Mongi Ben Zaied ◽  
Seifeddine Jomaa ◽  
Mohamed Ouessar
Keyword(s):  
Soil Erosion ◽  
Soil Loss ◽  
Scientific Evidence ◽  
Field Measurements ◽  
Spatiotemporal Variability ◽  
Soil Conditions ◽  
Storm Events ◽  
Erosion Processes ◽  
Study Results ◽  
Soil Losses

Soil erosion remains one of the principal environmental problems in arid regions. This study aims to assess and quantify the variability of soil erosion in the Koutine catchment using the RUSLE (Revised Universal Soil Loss Equation) model. The Koutine catchment is located in an arid area in southeastern Tunisia and is characterized by an annual mean precipitation of less than 200 mm. The model was used to examine the influence of topography, extreme rainstorm intensity and soil texture on soil loss. The data used for model validation were obtained from field measurements by monitoring deposited sediment in settlement basins of 25 cisterns (a traditional water harvesting and storage technique) over 4 years, from 2015 to 2018. Results showed that slope is the most controlling factor of soil loss. The average annual soil loss in monitoring sites varies between 0.01 and 12.5 t/ha/y. The storm events inducing the largest soil losses occurred in the upstream part of the Koutine catchment with a maximum value of 7.3 t/ha per event. Soil erosion is highly affected by initial and preceding soil conditions. The RUSLE model reasonably reproduced (R2 = 0.81) the spatiotemporal variability of measured soil losses in the study catchment during the observation period. This study revealed the importance of using the cisterns in the data-scarce dry areas as a substitute for the classic soil erosion monitoring fields. Besides, combining modeling of outputs and field measurements could improve our physical understanding of soil erosion processes and their controlling factors in an arid catchment. The study results are beneficial for decision-makers to evaluate the existing soil conservation and water management plans, which can be further adjusted using appropriate soil erosion mitigation options based on scientific evidence.

scholarly journals Soil losses and runoff variabilities in varieties of surface coverages

2021 ◽  
Vol 686 (1) ◽  
pp. 012022
Author(s):  
R Tirtalistyani ◽  
Ngadisih ◽  
R Irhamnia ◽  
E W Alfiani
Keyword(s):  
Soil Losses

scholarly journals Use of satellite and modeled soil moisture data for predicting event soil loss at plot scale

2015 ◽  
Vol 19 (9) ◽  
pp. 3845-3856 ◽  
Author(s):  
F. Todisco ◽  
L. Brocca ◽  
L. F. Termite ◽  
W. Wagner
Keyword(s):  
Soil Moisture ◽  
Soil Loss ◽  
Large Scale ◽  
Central Italy ◽  
Remote Sensing Data ◽  
Loss Estimation ◽  
Balance Model ◽  
Estimation Accuracy ◽  
Soil Losses

Abstract. The potential of coupling soil moisture and a Universal Soil Loss Equation-based (USLE-based) model for event soil loss estimation at plot scale is carefully investigated at the Masse area, in central Italy. The derived model, named Soil Moisture for Erosion (SM4E), is applied by considering the unavailability of in situ soil moisture measurements, by using the data predicted by a soil water balance model (SWBM) and derived from satellite sensors, i.e., the Advanced SCATterometer (ASCAT). The soil loss estimation accuracy is validated using in situ measurements in which event observations at plot scale are available for the period 2008–2013. The results showed that including soil moisture observations in the event rainfall–runoff erosivity factor of the USLE enhances the capability of the model to account for variations in event soil losses, the soil moisture being an effective alternative to the estimated runoff, in the prediction of the event soil loss at Masse. The agreement between observed and estimated soil losses (through SM4E) is fairly satisfactory with a determination coefficient (log-scale) equal to ~ 0.35 and a root mean square error (RMSE) of ~ 2.8 Mg ha−1. These results are particularly significant for the operational estimation of soil losses. Indeed, currently, soil moisture is a relatively simple measurement at the field scale and remote sensing data are also widely available on a global scale. Through satellite data, there is the potential of applying the SM4E model for large-scale monitoring and quantification of the soil erosion process.

scholarly journals Biopolymer additives to reduce erosion-induced soil losses during irrigation

2000 ◽  
Vol 11 (1) ◽  
pp. 19-29 ◽  
Author(s):  
William J. Orts ◽  
Robert E. Sojka ◽  
Gregory M. Glenn
Keyword(s):  
Soil Losses

scholarly journals Modelling soil losses from the ardeche rangelands

CATENA ◽  
1984 ◽  
Vol 11 (4) ◽  
pp. 377-389 ◽  
Author(s):  
J.M. Roels
Keyword(s):  
Soil Losses

scholarly journals Identifying erosive periods by using RUSLE factors in mountain fields of the Central Spanish Pyrenees

2008 ◽  
Vol 12 (2) ◽  
pp. 523-535 ◽  
Author(s):  
M. López-Vicente ◽  
A. Navas ◽  
J. Machín
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Loss ◽  
Rainfall Intensity ◽  
Soil Moisture Content ◽  
Rainfall Erosivity ◽  
Soil Erodibility ◽  
Maximum Rainfall ◽  
Freeze Thaw ◽  
Soil Losses

Abstract. The Mediterranean environment is characterized by strong temporal variations in rainfall volume and intensity, soil moisture and vegetation cover along the year. These factors play a key role on soil erosion. The aim of this work is to identify different erosive periods in function of the temporal changes in rainfall and runoff characteristics (erosivity, maximum intensity and number of erosive events), soil properties (soil erodibility in relation to freeze-thaw processes and soil moisture content) and current tillage practices in a set of agricultural fields in a mountainous area of the Central Pyrenees in NE Spain. To this purpose the rainfall and runoff erosivity (R), the soil erodibility (K) and the cover-management (C) factors of the empirical RUSLE soil loss model were used. The R, K and C factors were calculated at monthly scale. The first erosive period extends from July to October and presents the highest values of erosivity (87.8 MJ mm ha−1 h−1), maximum rainfall intensity (22.3 mm h−1) and monthly soil erosion (0.25 Mg ha−1 month−1) with the minimum values of duration of erosive storms, freeze-thaw cycles, soil moisture content and soil erodibility (0.007 Mg h MJ−1 mm−1). This period includes the harvesting and the plowing tillage practices. The second erosive period has a duration of two months, from May to June, and presents the lowest total and monthly soil losses (0.10 Mg ha−1 month−1) that correspond to the maximum protection of the soil by the crop-cover ($C$ factor = 0.05) due to the maximum stage of the growing season and intermediate values of rainfall and runoff erosivity, maximum rainfall intensity and soil erodibility. The third erosive period extends from November to April and has the minimum values of rainfall erosivity (17.5 MJ mm ha−1 h−1) and maximum rainfall intensity (6.0 mm h−1) with the highest number of freeze-thaw cycles, soil moisture content and soil erodibility (0.021 Mg h MJ−1 mm−1) that explain the high value of monthly soil loss (0.24 Mg ha−1 month−1). The interactions between the rainfall erosivity, soil erodibility, and cover-management factors explain the similar predicted soil losses for the first and the third erosive periods in spite of the strong temporal differences in the values of the three RUSLE factors. The estimated value of annual soil loss with the RUSLE model (3.34 Mg ha−1 yr−1) was lower than the measured value with 137Cs (5.38 Mg ha−1 yr−1) due to the low values of precipitation recorded during the studied period. To optimize agricultural practices and to promote sustainable strategies for the preservation of fragile Mediterranean agrosystems it is necessary to delay plowing till October, especially in dryland agriculture regions. Thus, the protective role of the crop residues will extend until September when the greatest rainfall occurs together with the highest runoff erosivity and soil losses.

scholarly journals Soil and Water Loss Rates in Oxisols Under No-tillage System in Western Paraná, Brazil

2018 ◽  
Vol 10 (10) ◽  
pp. 132
Author(s):  
Luana Salete Celante ◽  
Deonir Secco ◽  
Aracéli Ciotti de Marins ◽  
Daniela Trentin Nava ◽  
Flávio Gurgacz ◽  
...  
Keyword(s):  
Water Loss ◽  
Soil Loss ◽  
No Tillage ◽  
Linear Regression Models ◽  
Water Losses ◽  
Soil And Water Loss ◽  
Tillage System ◽  
Soil Losses ◽  
Soil And Water ◽  
Loss Rates

The objective of work was to quantify soil and water loss rates as a function of slope variation, correlating these rates with soybean yield. In addition to developing multiple linear regression models that associate water and soil loss rates in function of their physical attributes. The experiment was conducted in an Oxisols under a no-tillage system. The experiment was carried out in Cascavel, PR, Brazil. Four slopes (3.5%; 8.2%; 11.4% and 13.5%) were considered as treatments. The water and soil loss rates were monitored in the rainfall occurring during the crop development cycle. The water drained in each plot was collected in gutters made of polyvinyl chloride and stored in containers for the quantification of soil and water losses. The stepwise backward method was used to identify the variables that had a significant influence on water and soil losses. The unevenness of the terrain did not influence the soil and water loss rates. The maximum soil and water losses during the soybean cycle were, respectively, 0.01962 Mg ha-1 and 4.07 m3 ha-1. The maximum soil and water losses occurred when the precipitation volume was up to 82 mm. Soil and water losses showed a higher correlation with macroporosity and bulk density. Soybean grain yield showed a higher linear correlation with water, and soil loss and was higher at the slopes of 8.2% and 13.4%. The low water and soil losses demonstrate the soil capacity, managed under a no-tillage system, to minimize environmental impacts.

scholarly journals CATCHMENT AREA EROSION STUDY IN ESTIMATION OF RESERVOIR CAPACITY AT THE END OF LIFE EXPECTANCY (CASE STUDY : GONDANG RESERVOIR, KARANGANYAR)

2020 ◽  
Vol 11 (1) ◽  
pp. 15-24
Author(s):  
Dhanang Samatha Putra
Keyword(s):  
Life Expectancy ◽  
Distribution Pattern ◽  
Central Java ◽  
Sediment Volume ◽  
Area Reduction ◽  
Dam Management ◽  
Reduction Methods ◽  
Dead Storage ◽  
Effective Life

Gondang Reservoir is one of The National Strategic Projects. Located in Karanganyar Regency, Central Java Province, Gondang Reservoir has 2.08 Mm3 flood storage, 5.03 Mm3 effective storage, 2.03 Mm3 dead storage and 30 years lifetime. In the dam management, one of the problems that often occurs is sedimentation. To overcome this problem, we need to know the sedimentation rate and distribution pattern of Gondang Reservoir for optimalizing the reservoir management. To predict the distribution pattern of the reservoir we use Empirical Area Reduction Methods. The findings of the study show that the sediment volume of the reservoir throughout its effective life is 2,79 Mm3, the new zero elevation is +496 m, there is no remaining dead storage and the remaining effective storage is 2.2 Mm3. This indicates that theoretically the reservoir will work well up to its life expectancy. Dam sedimentation management with structural or non structural must be planned especially at effective storage. Dam sedimentation management at effective storage is very important in order to maintain Gondang Reservoir benefits.

scholarly journals MAGNITUDE OF SOIL LOSSES THROUGHOUT THE CARIBBEAN

1969 ◽  
Vol 79 (1-2) ◽  
pp. 89-90
Author(s):  
Miguel A. Lugo-López ◽  
F. Abruña
Keyword(s):  
The Caribbean ◽  
Soil Losses

MAGNITUDE OF SOIL LOSSES THROUGHOUT THE CARIBBEAN

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