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Journal articles on the topic 'Soil Moisture Retention Curve'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Silva, Luana da, Jackson Adriano Albuquerque, Letícia Sequinatto, and Diego Bortolini. "Adjusting the water retention curve for retractable soils." DYNA 88, no. 218 (2021): 136–42. http://dx.doi.org/10.15446/dyna.v88n218.89499.

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The soil water retention curve (SWRC) relates moisture to soil water retention energy (matrix potential). The calculation of the volumetrichumidity considers the sample volume. In retractable soils, this volume varies according to the drying or wetting of the soil, which can result in errors in the calculated moisture. The objective of this study is to quantify the volume variation in retractable soils and to elaborate the SWRC via the traditional method, which does not consider soil retraction, and a second method, called adjusted, that considers thephenomenon of soil retraction. Soil samples

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2

Anderson, M. G., S. Howes, P. E. Kneale, and J. M. Shen. "On Soil Retention Curves and Hydrological Forecasting in Ungauged Catchments." Hydrology Research 16, no. 1 (1985): 11–32. http://dx.doi.org/10.2166/nh.1985.0002.

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In many physically based hydrological models, there is the requirement to specify the suction-moisture curve of the soil system. This paper shows that where the suction moisture curve is known, then a model can be derived to predict groundwater rise. Secondly, it is shown that with only mapped soils data, relationships exist that allow suction-moisture curves to be predicted. This prediction scheme is incorporated into a forecasting model for ungauged catchments and results are presented to show the potential validity of the scheme for operational forecasting.

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3

Madi, Raneem, Gerrit Huibert de Rooij, Henrike Mielenz, and Juliane Mai. "Parametric soil water retention models: a critical evaluation of expressions for the full moisture range." Hydrology and Earth System Sciences 22, no. 2 (2018): 1193–219. http://dx.doi.org/10.5194/hess-22-1193-2018.

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Abstract. Few parametric expressions for the soil water retention curve are suitable for dry conditions. Furthermore, expressions for the soil hydraulic conductivity curves associated with parametric retention functions can behave unrealistically near saturation. We developed a general criterion for water retention parameterizations that ensures physically plausible conductivity curves. Only 3 of the 18 tested parameterizations met this criterion without restrictions on the parameters of a popular conductivity curve parameterization. A fourth required one parameter to be fixed. We estimated pa

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Scott, Bethany L., Tyson E. Ochsner, Bradley G. Illston, Christopher A. Fiebrich, Jeffery B. Basara, and Albert J. Sutherland. "New Soil Property Database Improves Oklahoma Mesonet Soil Moisture Estimates*." Journal of Atmospheric and Oceanic Technology 30, no. 11 (2013): 2585–95. http://dx.doi.org/10.1175/jtech-d-13-00084.1.

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Abstract Soil moisture data from the Oklahoma Mesonet are widely used in research efforts spanning many disciplines within Earth sciences. These soil moisture estimates are derived by translating measurements of matric potential into volumetric water content through site- and depth-specific water retention curves. The objective of this research was to increase the accuracy of the Oklahoma Mesonet soil moisture data through improved estimates of the water retention curve parameters. A comprehensive field sampling and laboratory measurement effort was conducted that resulted in new measurements

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5

Almeida, Eurileny Lucas de, Adunias dos Santos Teixeira, Francisco Chagas da Silva Filho, Raimundo Nonato de Assis Júnior, and Raimundo Alípio de Oliveira Leão. "Filter Paper Method for the Determination of the Soil Water Retention Curve." Revista Brasileira de Ciência do Solo 39, no. 5 (2015): 1344–52. http://dx.doi.org/10.1590/01000683rbcs20140546.

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ABSTRACT High cost and long time required to determine a retention curve by the conventional methods of the Richards Chamber and Haines Funnel limit its use; therefore, alternative methods to facilitate this routine are needed. The filter paper method to determine the soil water retention curve was evaluated and compared to the conventional method. Undisturbed samples were collected from five different soils. Using a Haines Funnel and Richards Chamber, moisture content was obtained for tensions of 2; 4; 6; 8; 10; 33; 100; 300; 700; and 1,500 kPa. In the filter paper test, the soil matric poten

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6

Renato Américo de Araújo Neto, Ivomberg Douardo Magalhães, Guilherme Bastos Lyra, Stoecio Malta Ferreira Maia, and Gustavo Bastos Lyra. "Physical and hydrological characteristics and modelling of the soil water retention curve in the brazilian semi-arid region." Bioscience Journal 38 (May 24, 2022): e38031. http://dx.doi.org/10.14393/bj-v38n0a2022-54195.

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Semiarid regions are characterised by water scarcity, a limiting factor on plant growth and development. The Sertão Canal was built in the semiarid region of Brazil, more specifically in the state of Alagoas, with the aim of making year-round irrigation possible. However, for the best water management, a physical and hydrological knowledge of the soils is necessary. As such, the aim of this study was to determine the physical and hydrological characteristics of three different types of soil (Argisol, Quartzarenic Neossol and Regolithic Neossol) under native vegetation (Caatinga) and agricultur

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7

Azan Basallo, Yasser, FRANCISCO ANTONIO HORTA RANGEL, JULIO CESAR LEAL VACA, JOSE MIGUEL SORIA UGALDE, and Jorge Luis Morales Martínez. "ALTERNATIVE ESTIMATION OF THE SOIL WATER RETENTION CURVE BASED ON THE ARYA-PARIS MODEL." DYNA ENERGIA Y SOSTENIBILIDAD 12, no. 1 (2023): [11P.]. http://dx.doi.org/10.6036/es10775.

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ABSTRACT: The physical and chemical characteristics of a soil determine its hydraulic properties, such as hydraulic conductivity, infiltration, and moisture. Due to the usefulness of a soil's moisture retention characteristic curve, several methodologies have been developed to obtain it. Mathematical models for the prediction of this hydraulic property constitute a type of methodologies that is economical and very affordable. One of the most practical models is the model of Arya and Paris (1981), which, however, requires an adjustment parameter, which limits its applicability in some cases, an

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8

Grigolon, Gilmar Batista, Adriano Valentim Diotto, Carlos José Gonçalves de Souza Lima, João Paulo Francisco, and Marcos Vinícius Folegatti. "MINIMUM NUMBER OF POINTS FOR A RELIABLE SOIL WATER RETENTION CURVE USING RICHARDS’ PRESSURE CHAMBER." REVISTA ENGENHARIA NA AGRICULTURA - REVENG 28 (December 18, 2020): 477–87. http://dx.doi.org/10.13083/reveng.v29i1.7320.

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The soil hydro-physical characteristics are very important for studies about soil water dynamics. The soil water retention curve it is a soil characteristic sometimes expensive and time consuming to be done and could be a problem for farmers. The numbers of points and its tension evaluated are normally choose arbitrarily. This study aimed to define the fewest pairs of soil moisture and water soil potential points which result in a reliable water retention curve in two different soils (sandy and clay). Using different tensions by suction table and Richards’ pressure chamber, nine replications w

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9

Tavares Ordones Lemos, Lis, Fábio Ponciano de Deus, Michael Silveira Thebaldi, Adriano Valentim Diotto, Valter Carvalho de Andrade Júnior, and Rodrigo César de Almeida. "Influence of the soil water retention curve type and magnetic water treatment on lettuce irrigation management responses." Water Supply 21, no. 6 (2021): 2850–62. http://dx.doi.org/10.2166/ws.2021.038.

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Abstract This study aimed to evaluate the influence of magnetized water use on lettuce irrigation management responses, and based on the generated data, to evaluate by simulation the influence of soil water retention curve type on the lettuce irrigation management responses. This work was divided into three stages: 1 – determination of field and laboratory soil water retention curves; 2 – lettuce crop irrigation management experiment using soil water retention curve with field data, evaluating different soil water tensions to start irrigation and different water types (magnetically treated wat

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10

Abdulwadood, Huda W., Gheidaa S. H. Al-Hassany, and Reem I. Mustafa. "IDW Interpolation of Soil Moisture Retention Curve Utilizing GIS." IOP Conference Series: Earth and Environmental Science 856, no. 1 (2021): 012040. http://dx.doi.org/10.1088/1755-1315/856/1/012040.

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11

Baboshkina, Svetlana V., Olga A. Elchininova, Alexander V. Puzanov, and Tamara A. Rozhdestvenskaya. "Computer simulation of the soil water regime under an apple orchard in a mountainous area (using the example of the leached chernozem of the experimental agricultural station Gorno-Altaiskoe)." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 336, no. 1 (2025): 147–59. https://doi.org/10.18799/24131830/2025/1/4617.

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Relevance. Progressive degradation of farmland soils – erosion, salinization, desertification. Aim. To establish features of water-physical properties of leached chernozem under an apple orchard and associated patterns of soil profile moisture distribution in summer period when precipitation deficiency observed. Methods. Moisture content in soil horizons was determined by the gravimetric method. To determine the granulometric composition of soils, the pipette method was used. The soil bulk density was determined by the cutting ring method. For solid phase density determination the pycnometric

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12

BACCHI, O. O. S., K. REICHARDT, J. C. M. OLIVEIRA, and D. R. NIELSEN. "Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve." Scientia Agricola 55, no. 3 (1998): 498–502. http://dx.doi.org/10.1590/s0103-90161998000300019.

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The soil water retention curve is fundamental for the hydraulic characterization of a soil and has many applications in agricultural research as well as in practical agriculture. A new procedure for soil moisture and soil bulk density evaluation inside closed pressure chambers through gamma-ray beam attenuation is presented. The proposed procedure presents several advantages in relation to the traditional process: avoids the need of continuous sample manipulation; minimizes the problem of hysteresis; allows a more precise evaluation of soil moisture by taking into account changes of soil bulk

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Holcomb, E. Jay, Robert Berghage, and William Fonteno. "Student Laboratory Exercise to Understand Air and Water Relations in Container Substrates." HortScience 30, no. 4 (1995): 900B—900. http://dx.doi.org/10.21273/hortsci.30.4.900b.

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The concepts of container water-holding capacity and air-filled porosity are important yet complicated for students interested in containerized crop production; however, both of these concepts can be observed and understood more completely if students develop a moisture retention curve. Our objectives were to describe an easy-to-construct and economical apparatus for creating a moisture retention curve and then to compare this curve with one generated by standard methods. The student method (column method) is constructed from plastic pipe cut into 5-cm sections. The sections of pipe are indivi

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14

Zamin, Bakht, Hassan Nasir, Khalid Mehmood, and Qaiser Iqbal. "Field-Obtained Soil-Water Characteristic Curves of KPK Expansive Soil and Their Prediction Correlations." Advances in Civil Engineering 2020 (November 20, 2020): 1–13. http://dx.doi.org/10.1155/2020/4039134.

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Expansive clays are found worldwide in arid and semiarid regions. Such soils are considered a natural hazard for civil engineering infrastructures especially when they are lightly loaded. Expansive soils are often unsaturated due to the high absorption capacity of moisture. The damaging effect of expansive soils is intimately related to the distinctive soil-water characteristic in the surficial soil layers subjected to wetting-drying cycles. The soil-water characteristic curve (SWCC) also known as the water-retention curve shows the fluctuation of suction with the moisture content. It is one o

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15

Cornelis, Wim M., Jan Ronsyn, Marc Van Meirvenne, and Roger Hartmann. "Evaluation of Pedotransfer Functions for Predicting the Soil Moisture Retention Curve." Soil Science Society of America Journal 65, no. 3 (2001): 638–48. http://dx.doi.org/10.2136/sssaj2001.653638x.

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16

Voltz, Marc, and Michel Goulard. "Spatial interpolation of soil moisture retention curves." Geoderma 62, no. 1-3 (1994): 109–23. http://dx.doi.org/10.1016/0016-7061(94)90031-0.

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17

El Youssef, Rawan, Sandrine Rosin-Paumier, and Adel Abdallah. "Determination of the Unsaturated Hydraulic Parameters of Compacted Soil Under Varying Temperature Conditions." Geotechnics 5, no. 2 (2025): 38. https://doi.org/10.3390/geotechnics5020038.

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Heat storage in compacted soil embankments is a promising technology in energy geotechnics, but its impact on the thermo-hydraulic behavior of unsaturated soils remains insufficiently understood. This paper investigates coupled heat and moisture transfer in unsaturated soil under different thermal conditions using a new bottom-heating method. The thermo-hydraulic response is monitored along the soil column and compared to an isothermal drying test. Variations in suction and water content were analyzed to determine water retention curve and to derive unsaturated hydraulic conductivity using the

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18

TRAVOVA, S. V., V. M. STEPANENKO, A. I. MEDVEDEV, M. A. TOLSTYKH, and V. YU BOGOMOLOV. "QUALITY OF SOIL SIMULATION BY INM RAS-MSU LAND SURFACE SCHEME AS A PART OF THE SL-AV WEATHER PREDICTION MODEL." Meteorologiya i Gidrologiya, no. 3 (March 2022): 5–24. http://dx.doi.org/10.52002/0130-2906-2022-3-5-24.

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In situ soil moisture and temperature observations are used to evaluate soil moisture and temperature analysis of the global atmospheric model SL-AV for the summer season of 2014 across Western Europe. It is shown that the seasonal temperature analysis trends are reproduced better than the seasonal trends of soil moisture. Numerical experiments with the offline land surface scheme demonstrated that the implementation of the Mualem-van Genuchten water retention curve has the advantage for describing the processes of soil moisture transfer in comparison with Brooks-Corey parameterization. The la

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19

Bahmani, Omid. "Evaluation of the short-term effect of tillage practices on soil hydro-physical properties." Polish Journal of Soil Science 52, no. 1 (2019): 43. http://dx.doi.org/10.17951/pjss.2019.52.1.43.

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<p><strong> </strong>Tillage is one of the most important practices that have a significant influence on the soil hydro-physical properties. In this study, the impact of the type and number of input variables with five different methods of the Retc model to predicting the moisture retention curve and soil water content in three surfaces tillage NT (No-tillage), CP (Chisel Plough) and MP (Moldboard Plough) and the impact of tillage systems on soil hydro-physical properties were evaluated. According to results, when the field capacity and wilting point moisture was added to inp

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20

Tewfik, Belal, Ghembaza Moulay Smaine, and Bellia Zoheir. "Experimental Study And Modeling Of Water Retention Curve Of A Silty Soil Compacted And Treated With Cement." Aceh International Journal of Science and Technology 9, no. 3 (2020): 157–76. http://dx.doi.org/10.13170/aijst.9.3.17853.

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The evaluation of unsaturated soils' fundamental properties is ensured by the characteristic water retention curve for a wide range of soil suction values. However, a minimal number of research works have focused on studying the water retention properties of natural soils and treated with hydraulic binders using soil-water characteristic curves (SWCC). The present work is motivated by the lack of experimental evidence of this type. Firstly, experimental measurements of soil-water characteristic curves of a natural loam soil from the region of Sidi Bel Abbes (Algeria), treated with cement and c

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21

Vereecken, Evy, Staf Roels, and Hans Janssen. "Centrifuge experiments for the determination of the moisture storage and transport properties in the overhygroscopic range." MATEC Web of Conferences 282 (2019): 02035. http://dx.doi.org/10.1051/matecconf/201928202035.

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This study explores the potential of a centrifuge experiment for hygric property determination. In this method, a core sample is placed in a tube which is spun at different rotational speeds to create a distribution of moisture contents and capillary pressures. This way, a simultaneous determination of the moisture retention curve and moisture permeability curve is possible. Measurements performed in the petroleum industry and in soil science already showed the technique to be an appropriate substitute for the pressure plate method. In building physics, the potential of the centrifuge method i

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22

Ket, Pinnara, Chantha Oeurng, and Aurore Degré. "Estimating Soil Water Retention Curve by Inverse Modelling from Combination of In Situ Dynamic Soil Water Content and Soil Potential Data." Soil Systems 2, no. 4 (2018): 55. http://dx.doi.org/10.3390/soilsystems2040055.

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Soil water retention curves (SWRCs) are crucial for characterizing soil moisture dynamics, and are particularly relevant in the context of irrigation management. Inverse modelling is one of the methods used to parameterize models representing these curves, which are closest to the field reality. The objective of this study is to estimate the soil hydraulic properties through inverse modelling using the HYDRUS-1D code based on soil moisture and potential data acquired in the field. The in situ SWRCs acquired every 30 min are based on simultaneous soil water content and soil water potential meas

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23

Romashchenko, M. I., S. S. Kolomiets, and A. S. Bilobrova. "LABORATORY DIAGNOSTIC SYSTEM FOR WATER-PHYSICAL SOIL PROPERTIES." Міжвідомчий тематичний науковий збірник "Меліорація і водне господарство", no. 2 (December 12, 2019): 199–208. http://dx.doi.org/10.31073/mivg201902-193.

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Actuality of the problem. Irrigation has become a determining factor in the formation of bioproduction processes of new agricultural crop varieties and hybrids due to global climate change for all soil-climatic zones of Ukraine. Moreover, irrigation efficiency is determined to a significant degree by the reliability of the soil water-physical properties. The purpose of comprehensive hydrophysical studies was to determine the basic soil water-physical properties and constants necessary to create favorable soil regimes of reclaimed lands, and to do the mathematical modeling of the soil water reg

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Silva, Antonio Carlos da, Jeane Cruz Portela, Rafael Oliveira Batista, et al. "Soil Water Retention in the Semiarid Region of Brazil." Journal of Agricultural Science 10, no. 9 (2018): 105. http://dx.doi.org/10.5539/jas.v10n9p105.

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From the physics point of view, soil structure is a dynamic attribute that is affected by genetic conditions and anthropogenic changes and requires an integrated approach. Soil water retention curve is one of the main tools used in soil structure evaluations. The objective of this work was to evaluate the structural and chemical attributes of soils of different classes and agroecosystems in the Terra de Esperança Settlement (Governador Dix Sept Rosado, Rio Grande do Norte, Brazil) to distinguish these environments. Disturbed and undisturbed soil samples were collected in horizons of 10 soil pr

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Groenevelt, P. H. "Hydrostatics of frozen soil." Canadian Journal of Soil Science 90, no. 3 (2010): 403–8. http://dx.doi.org/10.4141/cjss09032.

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An outline is presented of the relations between the energy status of water and the content of liquid water and ice in frozen soils. The theory formulates the dependence of the soil moisture characteristic (moisture retention curve) of a frozen soil on the load pressure and the temperature. This formulation requires the definition of the envelope-pressure potentials and the frost potentials of the soil moisture and the ice present in the soil. These potentials are expressed in terms of the void ratio, the moisture ratio, the ice ratio, the moisture ratio equivalent, and the ice ratio equivalen

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26

Abhishek, Kumar Ayush, and Shashi Shankar Ojha. "Assessment of Soil Moisture Variability for Urban Flood Risk Mitigation." NG Civil Engineering 1, no. 1 (2025): 32–42. https://doi.org/10.5281/zenodo.15390324.

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Urban flooding has become a recurring problem in rapidly developing cities like Patna, primarily due to poor drainage, increased impervious surfaces, and a lack of integrated soil-based flood risk assessment. This study investigates the variability in soil moisture and its influence on urban flood susceptibility across selected locations in Patna. Soil samples were collected from ten urban sites and analyzed in the laboratory for texture (sand, silt, clay), water content, specific gravity, and field capacity. The results indicate a predominance of silt and clay-rich soils in many areas, partic

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Coutinho de Oliveira, Luiz Fernando, Gabriela Rezende de Souza, Flávia Vilela Corrêa, and Jaíza Ribeiro Mota e Silva. "Parameter estimation of soil hydraulic characteristics by inverse modeling of the analytical equation for unsaturated subsurface water flow." Journal of Hydroinformatics 22, no. 5 (2020): 1270–82. http://dx.doi.org/10.2166/hydro.2020.015.

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Abstract In drip-irrigated systems, the understanding of the soil wetting pattern is essential in defining the area effectively irrigated, the spacing between the emitters and their installation depth, and the irrigation rate. Thus, this study aims to estimate soil hydraulic characteristics through inverse modeling of an analytical equation used in wetting bulb simulation based on soil moisture measurements obtained in the field. The parameters of the Gardner model, which describes the unsaturated soil hydraulic conductivity, and the van Genuchten model that describes the soil moisture retenti

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28

Cheng, Yang-Yang, Xu-Guang Gao, Tai-Heng Liu, et al. "Effect of Water Content on Strength of Alluvial Silt in The Lower Yellow River." Water 14, no. 20 (2022): 3231. http://dx.doi.org/10.3390/w14203231.

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In order to study the strength characteristics of alluvial silt in the lower Yellow River Channel at Luokou, Jinan, by varying the moisture content five times, direct shear tests were conducted and soil–water characteristics curves were obtained to explore the relationships between moisture content and matric suction as well as the bishop coefficient and shear strength. The soil–water characteristics curve test shows that the water retention curve of silt samples in the lower Yellow River can be fitted by the VG (Van Genuchten) model with the appropriate fitting coefficients. The direct shear

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29

Matziaris, Vasileios, Piotr Osinski, Jeganathan Vimalan, and Eugeniusz Koda. "Soil water retention curve of silty sand – experimental investigation using different laboratory methods." E3S Web of Conferences 382 (2023): 25005. http://dx.doi.org/10.1051/e3sconf/202338225005.

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Most of the infrastructure investments and earthworks not requiring deep foundations are usually designed in the vadose zone to avoid excessive groundwater-structure interactions. The mechanical behaviour of soil material, under partially saturated conditions, is greatly influenced by pore-water tension, known as soil suction, and the characteristics of the Soil Water Retention Curve (SWRC). In the present paper, the SWRC of a silty sand was determined using two different experimental methods. In the first method, a modified pore water pressure transducer was used for suction monitoring, while

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Jajarmizadeh, Milad, Sobri bin Harun, Shamsuddin Shahid, Shatirah Akib, and Mohsen Salarpour. "Impact of Direct Soil Moisture and Revised Soil Moisture Index Methods on Hydrologic Predictions in an Arid Climate." Advances in Meteorology 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/156172.

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The soil and water assessment tool (SWAT) is a physically based model that is used extensively to simulate hydrologic processes in a wide range of climates around the world. SWAT uses spatial hydrometeorological data to simulate runoff through the computation of a retention curve number. The objective of the present study was to compare the performance of two approaches used for the calculation of curve numbers in SWAT, that is, the Revised Soil Moisture Index (SMI), which is based on previous meteorological conditions, and the Soil Moisture Condition II (SMCII), which is based on soil feature

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Gómez, Angela V. "A Theoretical Pore Network Model for the Soil–Water Characteristic Curve and Hysteresis in Unsaturated Soils." Civil Engineering Journal 11, no. 2 (2025): 763–78. https://doi.org/10.28991/cej-2025-011-02-021.

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This study presents a novel approach to modeling the soil–water characteristic curve in unsaturated soils, employing Monte Carlo simulations to capture the complex behavior of the pore network. The primary objective is to develop an alternative method to represent the hysteretic nature of the soil–water characteristic curve, which is critical for understanding unsaturated soil behavior in various engineering applications. The proposed approach conceptualizes soil as a network of interconnected pores, where each pore interacts with its nearest neighbors. Monte Carlo simulations are used to mode

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Fang, Xiang Wei, Chun Ni Shen, Chun Hai Li, and Long Wang. "Test Study on Effects of Temperature, Sand Mix Ratios and Dry Density on Soil Water Characteristic Curves of Bentonite-Sand Mixtures." Applied Mechanics and Materials 580-583 (July 2014): 359–63. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.359.

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A series of tests on the soil water characteristic curve through moisture balance method were conducted to study the effects of temperature, sand mix ratios and dry density on the soil water characteristic curve of bentonite-sand mixture. The test results show that with the increase of temperature, the water retention capacity of the mixture significantly decreased. Within the test control suction range, sand mix ratios at the low suction had obvious effects on the soil water characteristic curve and at high suction the effects gradually decreased. Dry density had no effects on the soil water

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Beraldo, José M. G., José E. Cora, and Edemo J. Fernandes. "Measurement systems of soil water matric potential and evaluation of soil moisture under different irrigation depths." Engenharia Agrícola 32, no. 3 (2012): 467–78. http://dx.doi.org/10.1590/s0100-69162012000300006.

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The development of new methodologies and tools that enable to determine the water content in soil is of fundamental importance to the practice of irrigation. The objective of this study was to evaluate soil matric potential using mercury tensiometer and puncture digital tensiometer, and to compare the gravimetric soil moisture values obtained by tensiometric system with gravimetric soil moisture obtained by neutron attenuation technique. Four experimental plots were maintained with different soil moisture by irrigation. Three repetitions of each type of tensiometer were installed at 0.20 m dep

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Sobotkova, Martina, Michal Snehota, Michal Dohnal, and Chittaranjan Ray. "Determination of hydraulic properties of a tropical soil of Hawaii using column experiments and inverse modeling." Revista Brasileira de Ciência do Solo 35, no. 4 (2011): 1229–39. http://dx.doi.org/10.1590/s0100-06832011000400016.

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A method for determining soil hydraulic properties of a weathered tropical soil (Oxisol) using a medium-sized column with undisturbed soil is presented. The method was used to determine fitting parameters of the water retention curve and hydraulic conductivity functions of a soil column in support of a pesticide leaching study. The soil column was extracted from a continuously-used research plot in Central Oahu (Hawaii, USA) and its internal structure was examined by computed tomography. The experiment was based on tension infiltration into the soil column with free outflow at the lower end. W

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Yan, Guanxi, Thierry Bore, Zi Li, Stefan Schlaeger, Alexander Scheuermann, and Ling Li. "Application of Spatial Time Domain Reflectometry for Investigating Moisture Content Dynamics in Unsaturated Loamy Sand for Gravitational Drainage." Applied Sciences 11, no. 7 (2021): 2994. http://dx.doi.org/10.3390/app11072994.

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The strength of unsaturated soil is defined by the soil water retention behavior and soil suction acting inside the soil matrix. In order to obtain the suction and moisture profile in the vadose zone, specific measuring techniques are needed. Time domain reflectometry (TDR) conventionally measures moisture at individual points only. Therefore, spatial time domain reflectometry (spatial TDR) was developed for characterizing the moisture content profile along the unsaturated soil strata. This paper introduces an experimental set-up used for measuring dynamic moisture profiles with high spatial a

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Abdelmoneim, Ahmed Ali, Roula Khadra, Bilal Derardja, and Giovanna Dragonetti. "Internet of Things (IoT) for Soil Moisture Tensiometer Automation." Micromachines 14, no. 2 (2023): 263. http://dx.doi.org/10.3390/mi14020263.

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Monitoring of water retention behavior in soils is an essential process to schedule irrigation. To this end, soil moisture tensiometers usually equipped with mechanical manometers provide an easy and cost-effective monitoring of tension in unsaturated soils. Yet, periodic manual monitoring of many devices is a tedious task hindering the full exploitation of soil moisture tensiometers. This research develops and lab validates a low cost IoT soil moisture tensiometer. The IoT-prototype is capable of measuring tension up to −80 Kpa with R2 = 0.99 as compared to the same tensiometer equipped with

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Meskini-Vishkaee, F., M. H. Mohammadi, and M. Vanclooster. "Predicting the soil moisture retention curve, from soil particle size distribution and bulk density data using a packing density scaling factor." Hydrology and Earth System Sciences 18, no. 10 (2014): 4053–63. http://dx.doi.org/10.5194/hess-18-4053-2014.

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Abstract. A substantial number of models predicting the soil moisture characteristic curve (SMC) from particle size distribution (PSD) data underestimate the dry range of the SMC especially in soils with high clay and organic matter contents. In this study, we applied a continuous form of the PSD model to predict the SMC, and subsequently we developed a physically based scaling approach to reduce the model's bias at the dry range of the SMC. The soil particle packing density was considered as a metric of soil structure and used to define a soil particle packing scaling factor. This factor was

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Scorza Júnior, Rômulo P., João P. da Silva, and Renê L. de O. Rigitano. "Simulation of moisture profiles in a Latossol in Dourados region, in the State of Mato Grosso do Sul, Brazil." Engenharia Agrícola 30, no. 1 (2010): 22–32. http://dx.doi.org/10.1590/s0100-69162010000100003.

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The understanding of unsaturated soil water flow at process-level is essential to develop proper management actions for environmental protection in agricultural systems. One important tool for simulation of soil water flow that has been used worldwide is the SWAP model. The aim of this work was to test and to calibrate the SWAP model by inverse modeling to describe moisture profiles in a Brazilian very clayey Latossol in Dourados, State of Mato Grosso do Sul, Brazil. The SWAP model was tested in an experimental field of 0.09 ha cultivated with soybean and soil profiles were sampled eight times

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Tombul, M., Z. Akyürek, and A. Ünal Sorman. "Research Note:Determination of soil hydraulic properties using pedotransfer functions in a semi-arid basin, Turkey." Hydrology and Earth System Sciences 8, no. 6 (2004): 1200–1209. http://dx.doi.org/10.5194/hess-8-1200-2004.

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Abstract. Spatial and temporal variations in soil hydraulic properties such as soil moisture q(h) and hydraulic conductivity K(q) or K(h), may affect the performance of hydrological models. Moreover, the cost of determining soil hydraulic properties by field or laboratory methods makes alternative indirect methods desirable. In this paper, various pedotransfer functions (PTFs) are used to estimate soil hydraulic properties for a small semi-arid basin (Kurukavak) in the north-west of Turkey. The field measurements were a good fit with the retention curve derived using Rosetta SSC-BD for a loamy

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Alekseev, Viktor, Sergey Chuchkalov, Vladimir Philippov, Aleksey Rechnov, Sergey Vasiliev, and Vyacheslav Krasnov. "Simulation of drip irrigation on slope lands." BIO Web of Conferences 17 (2020): 00218. http://dx.doi.org/10.1051/bioconf/20201700218.

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One of the main tasks of drip irrigation is to predict the geometric parameters of the moisture contours by estimating the impact of the water rate and the irrigation water on the moisture distribution in the soil. In this paper the soil water retention curve and function of moisture conductivity are used to simulate the process of moisture movement taking into account both the state and the type of soil. A software tool has been developed to automate calculations and visualize them. One of the main advantages of this software tool is that it allows using three-dimensional arrays of porosity v

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Michot, Didier, Zahra Thomas, and Issifou Adam. "Nonstationarity of the electrical resistivity and soil moisture relationship in a heterogeneous soil system: a case study." SOIL 2, no. 2 (2016): 241–55. http://dx.doi.org/10.5194/soil-2-241-2016.

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Abstract. Understanding the role of vegetation in the interface between the atmosphere and groundwater is the most decisive key in analyzing the processes involved in water transfer. The main effect of vegetation is its root water uptake, which significantly modifies the processes involved in water transfer in the vadose zone. This paper focuses on mapping temporal and spatial changes in soil moisture using electrical resistivity tomography (ERT). The main objective is to assess how electrical resistivity (ER) is useful for mapping water distribution along a heterogeneous toposequence crossed

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John, Grunewald, Hirsch Hauke, and Petzold Hans. "Implementation of a method for converting soil properties into building physical material properties." E3S Web of Conferences 172 (2020): 14001. http://dx.doi.org/10.1051/e3sconf/202017214001.

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This article presents a method that can be used to convert soil properties into building physical material properties that meet the requirements of modern codes for transient hygrothermal simulations. The soil input data must be specified by the so-called “van Genuchten parameters” in order to predict the water retention curve and the hydraulic conductivity of unsaturated soils. The percentages of silt, sand and clay are used to calculate the moisture-dependent thermal conductivity for soils with different water saturation. The output is a validated set of hygrothermal material functions (mois

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Kameníčková, Ivana, and Lucie Larišová. "Using Two Pedotransfer Functions to Estimate Soil Moisture Retention Curves From One Experimental Site of South Moravia." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 62, no. 3 (2014): 501–6. http://dx.doi.org/10.11118/actaun201462030501.

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The soil moisture retention curves (SMRCs) were measured in laboratory conditions. The sand table and pressure extractor method were used to obtain a 9-point SMRCs for undisturbed soil samples taken from 20 cm depth. The data points of the individual retention curves were parameterized using the RETC computer program. For the same soil, the SMRCs were estimated by two models of pedotransfer functions (PTFs). In the first part of the study the Rosetta program with the model of artificial neural network (Schaap et al., 1998) was used. The PTFs derived by Wösten et al. (1998) were used in the sec

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Khan, M. K., M. D. Camillis, G. D. Emidio, and A. Bezuijen. "Experimental study to evaluate soil water retention curve of HYPER clay geosynthetic clay liner." IOP Conference Series: Materials Science and Engineering 1260, no. 1 (2022): 012027. http://dx.doi.org/10.1088/1757-899x/1260/1/012027.

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Abstract Geosynthetic clay liners are widely used as hydraulic barrier due to their low hydraulic conductivity but bentonite in the liners loses its effectiveness due to significant thermal fluxes by both diurnal and seasonal heating and cooling cycles. Modified sodium carboxy methyl cellulose-based bentonite clay (HYPER clay) has shown better hydraulic performance in both situations. A possible reason for this improved performance of HYPER clay based geosynthetic clay liner is the improvement in the suction under changing thermal conditions. Thus, the relationship between soil suction and moi

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Kubík, Ladislav. "Hydropedological parameters limiting soil moisture regime floodplain ecosystems of south Moravia." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 53, no. 1 (2005): 71–84. http://dx.doi.org/10.11118/actaun200553010071.

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Soil moisture regime of floodplain ecosystems in southern Moravia is considerably influenced and greatly changed by human activities. It can be changed negatively by water management engineering or positively by landscape revitalizations. The paper deals with problems of hydropedological characteristics (hydrolimits) limiting soil moisture regime and solves effect of hydrological factors on soil moisture regime in the floodplain ecosystems. Attention is paid especially to water retention curves and to hydrolimits – wilting point and field capacity. They can be acquired either directly by slow

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Jaiswal, R. K., T. Thomas, R. V. Galkate, and Jaivir Tyagi. "Soil Water Retention Modeling Using Pedotransfer Functions." ISRN Civil Engineering 2013 (December 10, 2013): 1–7. http://dx.doi.org/10.1155/2013/208327.

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The unsaturated hydraulic functions are key input data in numerical models of vadose zone processes. The direct measurement of soil moisture at different suction heads requires detailed analysis of soil samples with sophisticated instruments which can be replaced with the help of pedotransfer functions (PTFs) which are empirical relationships between the soil hydraulic properties and the more easily obtainable basic soil properties. The CalcPTF software has been used to compute the parameters of the most commonly used models of Brooks and Corey (BC) and Van Genuchten (VG) from PTFs for determi

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Biswas, A., and B. C. Si. "Spatial relationship between soil hydraulic and soil physical properties in a farm field." Canadian Journal of Soil Science 89, no. 4 (2009): 473–88. http://dx.doi.org/10.4141/cjss08052.

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The relationship between soil properties may vary with their spatial separation. Understanding this relationship is important in predicting hydraulic parameters from other soil physical properties. The objective of this study was to identify spatially dependent relationships between hydraulic parameters and soil physical properties. Regularly spaced (3-m) undisturbed soil samples were collected along a 384 m transect from a farm field at Smeaton, Saskatchewan. Saturated hydraulic conductivity, the soil water retention curve, and soil physical properties were measured. The scaling parameter, va

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Chandel, Sumita, and M. S. Hadda. "Quantification of surface runoff in Patiala-Ki-Rao watersheds using modified NRCS model: a case study." Journal of Applied and Natural Science 9, no. 3 (2017): 1573–81. http://dx.doi.org/10.31018/jans.v9i3.1403.

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Quantification of the surface runoff in a watershed is of vital importance for solution of many water resource problems. It can be quantified by employing large number of estimation approaches. Of these, SCS-CN approach is quite simple effective and requires less number of parameters. Thus, the objective of the study was to employ soil conservation service-curve number (SCS-CN) approach and their modifications to estimate surface runoff for Patiala-Ki-Rao watershed, district SAS, Nagar, Punjab and to choose the best model of the 8-different employed models. Soil moisture retention parameter wa

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Ajayi, A. E., M. S. Dias Junior, N. Curi, and I. Oladipo. "Compressive response of some agricultural soils influenced by the mineralogy and moisture." International Agrophysics 27, no. 3 (2013): 239–46. http://dx.doi.org/10.2478/v10247-012-0091-x.

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Abstract This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture retention by the core samples was typically low with pre-compression stress values ranging fro

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Chi, Chunming, Changwei Zhao, and Jinhu Zhi. "A Novel Three-Segment Model to Describe the Entire Soil–Water Characteristic Curve." Agronomy 14, no. 4 (2024): 707. http://dx.doi.org/10.3390/agronomy14040707.

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This study aims to accurately describe the soil–water characteristic curve (SWCC) across the full range from saturation to oven dryness. We propose a smooth, continuous three-segmented SWCC model that divides the saturation range into wet, air-dried, and oven-dried segments. The two model junction points are anchored at matric suctions of 104.5 and 106.5 cm, respectively. The soil water content at 104.5 cm represents the maximum soil hygroscopy, reflecting the maximum water content in air-dried soil, while the soil water content at 106.5 cm characterizes the minimum soil water content. This im

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