Article
Engineering, Geological
Pratiksha Pandey, Kaine Lynch, Vinayagamoorthy Sivakumar, Brian Solan, Snehasis Tripathy, Satyajeet Nanda, Shane Donohue
Summary: This study aimed to develop a novel approach for measuring the saturated and unsaturated permeability of soils, using low-humidity air circulation through a slender sand column at the center of samples to generate suctions, and measuring suctions with two tensiometers located at the base of the samples.
Article
Soil Science
David Tomashefski, Brian Slater
Summary: Organic carbon, permanganate-oxidizable carbon, and autoclaved citrate-extractable proteins are indicators of soil quality. This study found that untilled cropland soils had greater water-stable aggregation compared to tilled soils, which may be due to their greater water repellency when other aggregating agents are equivalent.
Article
Soil Science
Mingyu Su, Chongxuan Liu, Lian-Ping Wang, Wenjuan Zheng
Summary: In this study, an alternative modelling framework to estimate the saturated hydraulic conductivity (K-sat) of soil was proposed. The framework uses the void ratio and arithmetic mean diameter to estimate K-sat. The results showed that the Sauter mean diameter performed better than other diameter indicators and PTF-based models. This study provides guidance for future empirical relationships between soil water retention curves, other soil properties, and continuous particle size distribution functions.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Soil Science
S. Jace Kaminski, Behzad Ghanbarian, Stacey Kulesza, Bo V. Iversen, Andres Patrignani
Summary: Understanding the effect of sample volume on soil properties is important for hydrogeology, soil physics, and environmental engineering. This study uses percolation theory to estimate the scale dependency of hydraulic conductivity in soils. The researchers applied classification methods and conducted experiments on soil samples from four Danish sites to determine the relationship between pore size distribution and hydraulic conductivity. The theoretical estimates aligned well with experimental measurements, showing that the theory provides accurate estimations in certain soil textures and classes.
Article
Agronomy
Aram Ali, John McL Bennett, Andrew A. J. Biggs, Alla Marchuk, Afshin Ghahramani
Summary: This study evaluated the effects of alkaline irrigation water on soil properties using long leaching columns in different water qualities. The results showed that increased solution alkalinity led to higher pH, alkalinity, and sodicity in the soil profile, particularly for the soil surface and acidic soils. The HYDRUS-1D model was able to simulate these effects and the associated reduction in hydraulic conductivity, with potential for further improvement by incorporating a non-linear approach for determining pH hydraulic reduction scaling factor.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Environmental Sciences
Hasan Mozaffari, Ali Akbar Moosavi, Ali Reza Sepaskhah
Summary: The study evaluates the effects of long-term land use types on soil hydraulic properties, finding that different land use types have different impacts on hydraulic conductivity and pore size classes. The results are useful for accurately describing water flow patterns and chemical transport in soil environments.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Pujia Yu, Jinlian Liu, Hanya Tang, En Ci, Xuguang Tang, Shiwei Liu, Zhi Ding, Mingguo Ma
Summary: Land use change from farmland to afforested land in the karst regions of Southwest China significantly affects the distribution of soil aggregates, aggregate stability, and aggregate-associated organic carbon (OC). Afforestation increased the macroaggregate and microaggregate contents, as well as the stability of soil aggregates, while decreasing the silt + clay fraction content. The increase in SOC content in bulk soil and soil aggregates suggests that afforestation improves carbon sequestration and soil erosion control.
Article
Thermodynamics
Lei Chen, Feng Ming, Xiyan Zhang, Xiaobin Wei, Yuhang Liu
Summary: This study presents an experimental and theoretical method for obtaining the hydraulic conductivity of warm saturated frozen soil, which can accurately predict the hydraulic conductivity through a proposed equivalent model. The validity of the model is confirmed by comparing predictions with measured data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Mathematics, Interdisciplinary Applications
Gang Zhang, Hongyu Wang, Jahanzaib Israr, Wenguo Ma, Youzhen Yang, Keliang Ren
Summary: This study presents a rigorous mathematical approach for predicting the hydraulic conductivity of granular soils based on particle size distribution. By combining entropy theory with effective diameter, the proposed model accurately captures the particle size information of soils and improves the accuracy of saturated hydraulic conductivity calculation.
FRACTAL AND FRACTIONAL
(2022)
Article
Engineering, Geological
Ana Sofia Dias, Marianna Pirone, Marco Valerio Nicotera, Gianfranco Urciuoli
Summary: This study proposed a method to obtain soil hydraulic characterization in unsaturated conditions on natural pyroclastic samples and verified its feasibility through experiments. The approach enables a full evaluation of soil hydraulic properties and the effects of hydraulic hysteresis, successfully describing the hysteretic behavior of pyroclastic soil under various conditions and paths.
Article
Engineering, Civil
Boris Goenaga, B. Shane Underwood, Hamed Tirkolaei, Narayanan Neithalath
Summary: State highway agencies are required to comply with the NPDES, which mandates the infiltration of stormwater runoff from highways and the implementation of soil-based BMPs. This study assessed the impact of soil amendments on the compaction characteristics, hydraulic conductivity, and sinkage potential of six native soils in California.
TRANSPORTATION GEOTECHNICS
(2023)
Review
Green & Sustainable Science & Technology
Habib Ramezanzadeh, Davoud Zarehaghi, Ahmad Baybordi, Ali Chenari Bouket, Tomasz Oszako, Faizah N. Alenezi, Lassaad Belbahri
Summary: Biochar is a porous carbonaceous material that can improve the physical properties of soils. However, there is uncertainty about the effects of biochar application on soils, limiting its acceptance. Biochar affects the physical functions of soil, and factors such as feedstock, pyrolysis conditions, particle size, and rate of amendments influence its effectiveness. The chemical properties and interactions between biochar and soil interface also play a significant role in its impact.
Article
Environmental Sciences
Qiang Jin, Weiqi Wang, Josep Penuelas, Jordi Sardans, Xingfu Lan, Xuping Xu, Chun Wang
Summary: This study investigated the effects of different exogenous agents on carbon concentrations, stability of soil aggregates, and fungal community structure in double cropping paddy fields in southern China. The results showed that biochar treatments increased the carbon concentration of aggregates, and amendments with biochar and slag had long-lasting effects on the fungal community structure.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Water Resources
Xiang Huang, David L. Rudolph
Summary: This study presents a fully coupled thermal-hydraulic-mechanical model for variably saturated freezing soil, examining processes such as heat conduction, phase change, water movement, and ice lens development. The model's mechanisms were verified through laboratory experiments and parametric analyses, showing good agreement with literature data. Sensitivity analysis indicated that thermally-induced cryosuction is the main driver for water migration, while ice lens expansion causes consolidation and pore reduction in the unfrozen zone.
ADVANCES IN WATER RESOURCES
(2021)
Article
Engineering, Environmental
Jialiang Liu, Qiang Xu, Pinliang Li, Pan He, Chuanhao Pu, Kuanyao Zhao, Dalei Peng, Zhuo Wang
Summary: This study investigates the influence of compaction conditions on the saturated permeability of filling loess. Experimental and analytical methods are used to determine key parameters and develop models for predicting saturated permeability, which are important for engineering construction and monitoring.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Soil Science
S. H. Ahmadi, M. Agharezaee, A. A. Kamgar-Haghighi, A. R. Sepaskhah
SOIL USE AND MANAGEMENT
(2017)
Article
Meteorology & Atmospheric Sciences
Shohreh Didari, Seyed Hamid Ahmadi
THEORETICAL AND APPLIED CLIMATOLOGY
(2019)
Article
Agronomy
Seyed Hamid Ahmadi, Ali Reza Sepaskhah, Mojgan Zarei
AGRICULTURAL WATER MANAGEMENT
(2018)
Article
Agronomy
Seyed Hamid Ahmadi, Shahin Solgi, Ali Reza Sepaskhah
AGRICULTURAL WATER MANAGEMENT
(2019)
Article
Geosciences, Multidisciplinary
Seyed Hamid Ahmadi, Hasan Ghasemi, Ali Reza Sepaskhah
Article
Environmental Sciences
Seyed Hamid Ahmadi, Zahra Javanbakht
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2020)
Article
Soil Science
Fatemeh Mehrabi, Ali Reza Sepaskhah, Seyed Hamid Ahmadi
Summary: Soil water uptake is influenced by root growth and distribution. Limitations on root growth may decrease water and nutrient uptake, leading to slower plant growth. Different irrigation strategies, nitrogen application rates, and planting methods were found to have varying effects on winter wheat root growth. In-furrow planting and partial root-zone irrigation reduced root density compared to on-ridge planting and full irrigation, while nitrogen application increased root density. Higher root traits enhanced grain yield initially, but excessive values had a negative impact on yield.
NUTRIENT CYCLING IN AGROECOSYSTEMS
(2021)
Article
Agronomy
Seyed Hamid Ahmadi, Ali Reza Sepaskhah, Mojgan Zarei
Article
Engineering, Civil
Rouhollah Davarpanah, Seyed Hamid Ahmadi
Summary: This study used the AquaCrop model to simulate different deficit irrigation scenarios for winter wheat in a warm and semi-arid environment in Iran, finding that rotational irrigation is more adaptable and productive compared to on-demand irrigation in managing water stress. The research highlighted the importance of optimal irrigation timing and planning in achieving high grain yield and water productivity under different climate conditions.
JOURNAL OF HYDROLOGY
(2021)
Article
Chemistry, Physical
Fataneh Vasheghani Farahani, Mohammad Hassan Amini, Seyed Hamid Ahmadi, Seyed Amirabbas Zakaria
Summary: In this study, a LDH/C-dot nanocomposite was synthesized and used for the removal of Pb2+ ions from water. The chemical composition and morphology were investigated, and various parameters were optimized. The adsorption process was evaluated using different models, showing the efficient performance of the nanocomposite for Pb2+ ion adsorption.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Agronomy
Seyed Hamid Ahmadi, Mohammad Reza Reis Ghorra, Ali Reza Sepaskhah
Summary: The AquaCrop model was used to simulate the growth of potatoes in a hot semi-arid environment, and different irrigation managements were studied. The results showed that the model performed well in simulating potato growth and could be used as a reliable tool for irrigation water management and decision-making in potato production.
FIELD CROPS RESEARCH
(2022)
Article
Engineering, Civil
Shahin Solgi, Seyed Hamid Ahmadi, Ali Reza Sepaskhah, Mohsen Edalat
Summary: Water-saving through deficit irrigation management is an effective approach to improve water productivity in sustainable agriculture. Crop modeling can be used to evaluate the impact of different irrigation scenarios on yield and water productivity. This study assessed the effects of surface and sprinkler irrigation under different climatic scenarios and irrigation strategies. The results showed that reducing irrigation water by 30% improved water productivity in different growing seasons. Additionally, sprinkler irrigation can increase water productivity and sustain crop production in normal and wet years, but may have negative effects in other conditions. It is important to synchronize irrigation strategies with rainfall characteristics in areas with erratic rainfalls to enhance water productivity and maintain crop production.
JOURNAL OF HYDROLOGY
(2022)
Article
Water Resources
Seyed Hamid Ahmadi, Mohammad Hadi Jorenush, Saeed Boroomand Nasab
Summary: The parameterized AquaCrop model was used to simulate the four major elements affecting crop growth process of three irrigated winter wheat cultivars in different climatic conditions of southern Iran. The model showed high skill in simulating soil water content, canopy cover, biomass, and grain yield. AquaCrop was able to simulate grain yield and irrigation water productivity of different winter wheat cultivars under various conditions, making it a reliable decision-making tool for field managers and stakeholders.
JOURNAL OF WATER AND CLIMATE CHANGE
(2022)
Article
Agronomy
Shahin Solgi, Seyed Hamid Ahmadi, Sabine Julia Seidel
Summary: Agriculture is the world's largest consumer of freshwater resources. Remote sensing, using spectral vegetation indices, can monitor crop water status and help achieve sustainable agriculture. In a semi-arid area, the impact of irrigation management on canopy water status was assessed using vegetation indices. Results showed high correlations between the indices and locally calibrated leaf area index. Furthermore, the use of remotely sensed data successfully detected crop drought stress levels and identified management zones.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Multidisciplinary Sciences
Mojgan Radmanesh, Seyed Hamid Ahmadi, Ali Reza Sepaskhah
Summary: The SIRMOD and WinSRFR models were used to model and assess the irrigation performance under different irrigation strategies. The results showed that both models had excellent accuracy in simulating advance-recession times, infiltrated water depth, and runoff volume. It was found that surge irrigation improved irrigation management performance and irrigation method performance compared to continuous irrigation. Longer furrow lengths increased irrigation efficiency and deep percolation, while increasing the stream size decreased irrigation efficiency and deep percolation. The study demonstrated that these models are reliable tools for evaluating furrow irrigation strategies and can be used to improve water management in arid and semi-arid areas.
SCIENTIFIC REPORTS
(2023)
