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Electrical capacitance volume tomography for measurement soil water infiltration in vessel experiments

Journal of Central South University 2014年第1期21卷 358-364页

作者： Muhammad Mukhlisin Marlin Ramadhan Baidillah Mohd Raihan Taha Department of Civil and Structural Engineering Universiti Kebangsaan MalaysiaBangiSelangor 43600Malaysia Department of Civil Engineering Polytechnic Negeri SemarangJl.Sudarto SHTembalang 50275SemarangIndonesia

Electrical capacitance volume tomography(ECVT) is a recently-developed technique for real-time,non-invasive 3D monitoring of processes involving materials with strong contrasts in dielectric *** work is first application of the method to visualization of water flow in *** describe the principles behind the method,and then demonstrate its use with a simple laboratory infiltration experiment.32 ECVT sensors were installed on the sides of an empty PVC *** was poured into the column at a constant rate,and ECVT data were collected every *** column was then packed with dry sand and again supplied with water at a constant rate with data collected every *** were analyzed to give bulk average water contents,which proved consistent with the water supply *** were also analyzed to give 3D images(216 voxels) allowing visualization of the water distribution during the *** of this work shows that water infiltration into the soil,wall flow,progress of the unstable wetting front and the final water distribution are clearly visible.

关键词： soil water infiltration electrical capacitance volume tomography real time imaging

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Effects of alternate moistube-irrigation on soil water infiltration

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International Journal of Agricultural and Biological Engineering 2020年第4期13卷 151-158页

作者： Lixia Shen Yumeng Zhang Mei Yang Ronghao Liu College of water Conservancy and Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Urban and Environmental Science Northwestern UniversityXi’an 710127China

Alternate moistube-irrigation is a new type of water-saving irrigation,and research on water infiltration with alternate moistube-irrigation is important for the design of irrigation schemes and helpful to understand and apply this *** effects of the pressure head(1.0 m and 1.5 m)and tube spacing(10 cm,20 cm,and 30 cm between two moistubes respectively)on soil water infiltration in alternate moistube-irrigation were studied in laboratory experiments,and the cumulative infiltration,discharge of the moistube,and shape and water distribution of the cross-section of the wetting front were *** cumulative infiltration increased quickly and linearly with the infiltration time at 0-96 h(R^(2)>0.99),and changed smoothly at 96-192 h with a basically steady infiltration *** discharge of the moistube increased rapidly at the beginning of irrigation,then decreased before *** cumulative infiltrations and discharges of moistube under the 1.5 m pressure head were more than those under the 1.0 m pressure *** shape of the cross-section of the wetting front for a single moistube was similar to a concentric *** the increase of tube spacing,the interaction between water infiltrations of two moistubes *** soil water distributions around two moistubes were similar to each other under the 1.0 m pressure head and large tube *** the tube spacing was 20 cm,the soil water distribution was more uniform around two moistubes.

关键词： alternate irrigation moistube-irrigation soil water infiltration water use efficiency water-saving irrigation

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Simulated rainfall in Brazil:An alternative for assesment of soil surface processes and an opportunity for technological development

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International soil and water Conservation Research 2024年第1期12卷 29-42页

作者： Camila Calazans da Silva Luz Wilk Sampaio de Almeida Adilson Pacheco de Souza Nivaldo Schultz Jamil Alexandre Ayach Anache Daniel Fonseca de Carvalho Postgraduate Program in Agronomy-soil Sciences Federal Rural University of Rio de JaneiroSeropédicaRJBrazil Agronomy Department Federal Institute of EducationScience and Technology of RondôniaAriquemesROBrazil Federal University of Mato Grosso SinopMTBrazil Federal Rural University of Rio de Janeiro SeropédicaRJBrazil Federal University of Mato Grosso do Sul Campo GrandeMSBrazil

Rainfall simulators(RS)have been used,above all,to evaluate hydrological processes related to soil water infiltration,surface runoff and soil *** allow repeatability of rain application with different precipitation intensities in field and/or laboratory conditions and should produce events with physical characteristics similar to natural *** this manuscript,we carried out a bibliometric and scientometric analysis of studies with simulated rainfall in Brazil to assess the temporal evolution of publications,the main topics addressed and the degree of technological development of the *** searched for the terms“rainfall simulator”OR“simulated rainfall”AND“Brazil”in the Scopus,Web of Science,SciELO and Google Scholar *** found 143 articles published in the last 37 years(1985-2022).Our findings indicate that the main research areas covered in papers are soil erosion(57.34%),soil water infiltration(24.47%),nutrient losses(9.8%)and RS development and calibration/assessment(8.39%).In recent years,the number of published papers in international high-impact factor journals has *** of the papers(49.65%)refer to studies carried out by institutions located in the south and southeast regions of ***,there is a large gap of studies on simulated rainfall in other regions of Brazil,where important biomes such as the Cerrado,Amazon,Caatinga,and their transitions are *** study informs research priorities on soil erosion under simulated rainfall and provides a bibliographic database that can assist in more detailed future analyses.

关键词： Rainfall simulator soil and water losses soil water infiltration Bibliometrics Scientific review

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Comparing the soil Conservation Service model with new machine learning algorithms for predicting cumulative infiltration in semi-arid regions

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Pedosphere 2022年第5期32卷 718-732页

作者： Khabat KHOSRAVI Phuong T.T.NGO Rahim BARZEGAR John QUILTY Mohammad T.AALAMI Dieu T.BUI Department of watershed Management Engineering Ferdowsi University of MashhadMashhad 93(Iran) Department of Earth and Environment Florida International UniversityMiami 33199(USA) Institute of Research and Development Duy Tan UniversityDa Nang 550000(Vietnam) Department of Bioresource Engineering McGill UniversitySte Anne de Bellevue QC H9X(Canada) Faculty of Civil Engineering University of TabrizTabriz 51(Iran) Department of Civil and Environmental Engineering University of WaterlooWaterloo N2L 3G1(Canada) Department of Business and IT University of South-Eastern NorwayNotodden 3603(Norway)

water infiltration into soil is an important process in hydrologic cycle;however,its measurement is difficult,time-consuming and *** and physical models have been developed to predict cumulative infiltration(CI),but are often *** this study,several novel standalone machine learning algorithms(M5Prime(M5P),decision stump(DS),and sequential minimal optimization(SMO))and hybrid algorithms based on additive regression(AR)(i.e.,AR-M5P,AR-DS,and AR-SMO)and weighted instance handler wrapper(WIHW)(i.e.,WIHW-M5P,WIHW-DS,and WIHW-SMO)were developed for CI *** soil Conservation Service(SCS)model developed by the United States Department of Agriculture(USDA),one of the most popular empirical models to predict CI,was considered as a ***,154 measurements of CI(explanatory/input variables)were taken from 16 sites in a semi-arid region of Iran(Illam and Lorestan provinces).Six input variable combinations were considered based on Pearson correlations between candidate model inputs(time of measuring and soil bulk density,moisture content,and sand,clay,and silt percentages)and *** dataset was divided into two subgroups at random:70%of the data were used for model building(training dataset)and the remaining 30%were used for model validation(testing dataset).The various models were evaluated using different graphical approaches(bar charts,scatter plots,violin plots,and Taylor diagrams)and quantitative measures(root mean square error(RMSE),mean absolute error(MAE),Nash-Sutcliffe efficiency(NSE),and percent bias(PBIAS)).Time of measuring had the highest correlation with CI in the study *** best input combinations were different for different *** results showed that all hybrid algorithms enhanced the CI prediction accuracy compared to the standalone *** AR-M5P model provided the most accurate CI predictions(RMSE=0.75 cm,MAE=0.59 cm,NSE=0.98),while the SCS model had the lowest performance(RMSE=4.77 cm,MAE=2.64 cm,NSE=

关键词： additive regression hybrid algorithms empirical model soil water infiltration weighted instances handler wrapper

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ESTIMATION OF GARDNER-RUSSO MODEL PARAMETERS FOR soil water RETENTION CURVES USING HORIZONTAL infiltration DATA

ESTIMATION OF GARDNER-RUSSO MODEL PARAMETERS FOR SOIL WATER ...

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第四届智能化农业信息技术国际学术会议

作者： Chaowang Zou Xianghong Du National Engineering Reseerch Centep for Informalin Technlology in Agriculture Beijing 100097

＜正＞The accuracy of water flow and solute transport predictions depends on the reliability and accuracy of soil hydraulic *** main soil hydraulic properties are soil water retention curve and soil hydraulic conductivity *** direct methods for measurement of soil hydraulic properties are time-consuming and expensive,it is important to develop analytical *** this paper,the parameters of Gardner-Russo model for soil retention curves were obtained based on the rules of one- dimensional soil water *** relationship between infiltration time and cumulative infiltration, infiltration rate and wetting front were deduced,and fitted to the numerical infiltration results with coefficients of determination from 0.9969 *** measured saturated soil water content, residual soil water content,initial soil water content and saturated soil hydraulic conductivity,a simple method to estimate the parameters of Gardner-Russo model was developed based on the *** data and numerical simulations of water flow were used to evaluate the analytical *** analytical method provides a simple and quick transient water flow approach to estimate soil hydraulic properties.

关键词： soil water infiltration Numerical simulation Wetting front

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Effects of alfalfa coverage on runoff,erosion and hydraulic characteristics of overland flow on loess slope plots

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Frontiers of Environmental Science & Engineering 2011年第1期5卷 76-83页

作者： Shufang WU Pute WU Hao FENG G.P.Merkley College of water Resources and Architectural Engineering China Academy of Water-saving Agriculture on Arid RegionsNorthwest A&F UniversityYangling 712100China State Key Laboratory of soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of SciencesYangling 712100China Biological and Irrigation Engineering Department Utah State UniversityLoganUT 84116USA

An evaluation of the interactions between vegetation,overland and soil erosion can provide valuable insight for the conservation of soil and *** experiment was conducted to study water infiltration,runoff generation process,rate of sediment erosion,and hydrodynamic characteristics of overland flow from a sloping hillside with different draw-off discharges from alfalfa and control plots with 20°*** effect of alfalfa on runoff and sediment transport reduction was quantitatively *** was discussed for its ability to reduce the overland flow scouring force or change the runoff *** to the bare-soil plots,alfalfa plots generated a 1.77 times increase in infiltration ***,the down-slope water infiltration rate for the bare soil plots was higher than in the up-slope,while the opposite was found in the alfalfa *** addition,alfalfa had a significant effect on runoff and sediment *** comparison to the control,the runoff coefficient and sediment transportation rate decreased by 28.3%and 78.4%in the grass slope,*** runoff generated from the alfalfa and bare-soil plots had similar trends with an initial increase and subsequent leveling to a steady-state *** transport of sediment reduced with time as a consequence of the depletion of loose surface *** maximum sediment concentration was recorded within the first few minutes of each *** alfalfa plots had subcritical flow while the baresoil plots had supercritical flow,which indicate that the capability of the alfalfa slope for resisting soil erosion and sediment movement was greater than for bare soil ***,the flow resistance coefficient and roughness coefficient for the alfalfa plots were both higher than for the bare-soil plots,which indicate that overland flow in alfalfa plots had retarded and was blocked,and the flow energy along the runoff path had gradually ***,the ability to erode and transport sediment had de

关键词： alfalfa soil erosion runoff and sedimentation soil water infiltration overland flow hydrodynamic characteristics

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