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1. Improved region growing method for image segmentation of three-phase materials

Author:
Cheng, Zhuang; Wang, Jianfeng
Source:
Powder technology 2020 v.368 pp. 80-89
ISSN:
0032-5910
Subject:
soil water content,   etc   ; micro-computed tomography; soil water; water content;     Show all 4 Subjects
Abstract:
... This paper presents an improved region growing method for the segmentation of images comprising three phases. It is shown that image segmentation errors usually occur at the interfaces between the two phases with the highest and lowest grayscale intensity levels among the three phases (i.e. partial volume effect rings appear) when global thresholding (GT) or a traditional region growing (TRG) meth ...
DOI:
10.1016/j.powtec.2020.04.032

2. A study of layered-unlayered extraction of benzene in soil by SVE

Author:
Shi, Junxiang; Yang, Yang; Li, Juan; Xi, Beidou; Wang, Ying; Wang, Yang; Tang, Jun
Source:
Environmental pollution 2020 v.263 pp. 114219
ISSN:
0269-7491
Subject:
soil water content,   etc   ; air flow; benzene; polluted soils; pollution control; soil vapor extraction; volatilization;     Show all 7 Subjects
Abstract:
... With the aim to improve the pollution removal efficiency, a layered extraction simulation device for the removal of benzene-contaminated soil via soil vapor extraction was constructed. The removal of benzene from soils by both layered extraction and unlayered extraction was explored based on the factors of extraction flow, extraction time, initial contaminant content, initial soil moisture content ...
DOI:
10.1016/j.envpol.2020.114219

3. Verification of high resolution (12 km) Global Ensemble Prediction System

Author:
Mamgain, Ashu; Sarkar, Abhijit; Rajagopal, E.N.
Source:
Atmospheric research 2020 v.236 pp. 104832
ISSN:
0169-8095
Subject:
soil water content,   etc   ; prediction; rain; soil temperature; surface water temperature; tropics; uncertainty; weather forecasting; wind; India;     Show all 10 Subjects
Abstract:
... Ensemble Prediction Systems (EPSs) are used to estimate the uncertainty in a weather forecast as well as the most likely outcome. To improve weather forecasts and services, the global EPS at the NCMRWF has been upgraded to 12 km horizontal resolution (with 22 perturbed +1 control members). Although the upgraded version of EPS had become operational from 1st June 2018 in the newly acquired high-per ...
DOI:
10.1016/j.atmosres.2019.104832

4. A novel segmental model to describe the complete soil water retention curve from saturation to oven dryness

Author:
Du, Chaoyang
Source:
Journal of hydrology 2020 v.584 pp. 124649
ISSN:
0022-1694
Subject:
soil water content,   etc   ; databases; equations; models; ovens; soil water; soil water characteristic; water content; Washington (state);     Show all 9 Subjects
Abstract:
... Traditional water retention models that use the residual water content parameter fail to accurately describe the dry end of the soil water retention curve (SWRC). We developed two- and three-segment smooth, continuous SWRC models, acknowledging the existence of three saturation states, for water contents ranging from saturation to oven-dryness. The equations near the oven dryness end in both model ...
DOI:
10.1016/j.jhydrol.2020.124649

5. Scale and location dependent time stability of soil water storage in a maize cropped field

Author:
Vidana Gamage, Duminda N.; Biswas, Asim; Strachan, Ian B.
Source:
Catena 2020 v.188 pp. 104420
ISSN:
0341-8162
Subject:
soil water content,   etc   ; autumn; corn; evapotranspiration; fiber optics; soil water; soil water storage; summer; wavelet; Quebec;     Show all 10 Subjects
Abstract:
... Time stability of soil water storage (SWS) is the similarity of spatial patterns of soil water storage over time and is scale and location dependent due to multivariate effects of controlling factors. However, our understanding of scale and location dependency of the time stability of SWS and its seasonally dependent controls in cropped fields is inadequate. This study examined the scale and locat ...
DOI:
10.1016/j.catena.2019.104420

6. Soil respiration negatively correlated with volume gains by a young Pinus radiata clone over five months

Author:
Gu, Xinyun; Zhou, Xiaoqi; Zhou, Jing; Smaill, Simeon J.; Clinton, Peter W.
Source:
Geoderma 2020 v.361 pp. 114105
ISSN:
0016-7061
Subject:
soil water content,   etc   ; Pinus radiata; clones; forests; greenhouse experimentation; greenhouses; soil respiration; temperature; tree growth; trees;     Show all 10 Subjects
Abstract:
... It is assumed that greater plant productivity enhances autotrophic respiration (Rₐ). In a glasshouse trial using a one year old Pinus radiata D. Don clone selected for rapid growth, we examined the relationship between soil respiration, its components and tree growth rates over approximately five months. Soil respiration and Rₐ were significantly influenced by temperature; the response of heterotr ...
DOI:
10.1016/j.geoderma.2019.114105

7. Lysimeter measurements of nocturnal and diurnal grapevine transpiration: Effect of soil water content, and phenology

Author:
Montoro, Amelia; Torija, Irene; Mañas, Fernando; López-Urrea, Ramón
Source:
Agricultural water management 2020 v.229 pp. 105882
ISSN:
0378-3774
Subject:
soil water content,   etc   ; Vitis; evapotranspiration; growing season; lysimeters; microprocessors; phenology; semiarid zones; soil water; transpiration; Spain;     Show all 11 Subjects
Abstract:
... An experiment was carried out in a semi-arid area of Spain (Albacete) with the objective of quantifying the transpiration of grapevine cv. Tempranillo. Measurements of transpiration were taken in a weighing lysimeter over five years (2012–2016); the soil surface was covered with a waterproof canvas to avoid the evaporative component of evapotranspiration. The sample frequency was 1 s, and a mean v ...
DOI:
10.1016/j.agwat.2019.105882

8. To study the effect of different parameters on the thermal performance of ground-air heat exchanger system: In situ measurement

Author:
Agrawal, Kamal Kumar; Misra, Rohit; Agrawal, Ghanshyam Das
Source:
Renewable energy 2020 v.146 pp. 2070-2083
ISSN:
0960-1481
Subject:
soil water content,   etc   ; air flow; air temperature; cooling; heat exchangers; renewable energy sources; water content;     Show all 7 Subjects
Abstract:
... In the present experimental work, two identical real field experimental setups (with dry soil and wet soil) of ground-air heat exchanger (GAHE) have been developed in order to evaluate the influence of change in inlet air temperature, airflow velocity, diameter of pipe and soil moisture content on the thermal performance of GAHE system. Influence of these parameters on the required pipe length to ...
DOI:
10.1016/j.renene.2019.08.065

9. Evaluation of 11 soil thermal conductivity schemes for the permafrost region of the central Qinghai-Tibet Plateau

Author:
Du, Yizhen; Li, Ren; Zhao, Lin; Yang, Chengsong; Wu, Tonghua; Hu, Guojie; Xiao, Yao; Zhu, Xiaofan; Yang, Shuhua; Ni, Jie; Ma, Junjie
Source:
Catena 2020 v.193 pp. 104608
ISSN:
0341-8162
Subject:
soil water content,   etc   ; freeze-thaw cycles; frozen soils; heat; permafrost; quartz; seasonal variation; temperature; thermal conductivity; China;     Show all 10 Subjects
Abstract:
... Soil thermal conductivity (λ), which describes the ability of the soil to transfer heat, is critical to understand the thermal regime of ground surfaces. In this study, in situ measurements of λ were conducted at two field sites in the permafrost region of the central Qinghai-Tibet Plateau (QTP) and the results were used to evaluate 11 schemes of λ at depths of 10–50 cm during the freeze-thaw cycl ...
DOI:
10.1016/j.catena.2020.104608

10. On the potential impact of root system size and density on salt distribution in the root zone

Author:
Liu, Anqi; Qu, Zhongyi; Nachshon, Uri
Source:
Agricultural water management 2020 v.234 pp. 106118
ISSN:
0378-3774
Subject:
soil water content,   etc   ; crops; ecosystems; irrigation; rhizosphere; root systems; salinity; salt concentration; soil salinization; soil water; solutes; tomatoes;     Show all 12 Subjects
Abstract:
... Soil salinization in agricultural environments is a major soil degradation process, particularly in dry regions. Soil salinization puts at risk the natural ecosystem and the agricultural crops, which are usually sensitive to elevated salinities. In this work, a conceptual model is proposed and tested experimentally, to examine the impact of root system dimension and distribution on solute transpor ...
DOI:
10.1016/j.agwat.2020.106118

11. Evaluating the capabilities of optical/TIR imaging sensing systems for quantifying soil water content

Author:
Petropoulos, G. P.; Srivastava, P. K.; Ferentinos, K. P.; Hristopoulos, D.
Source:
Geocarto international 2020 v.35 no.5 pp. 494-511
ISSN:
1752-0762
Subject:
soil water content,   etc   ; data collection; energy; hydrologic cycle; image analysis; soil water; spatial variation; temporal variation; water resources;     Show all 9 Subjects
Abstract:
... Surface Soil Moisture (SSM) is a key parameter of global energy and water cycle, and knowing its spatiotemporal variability is of key importance in an array of research topics and practical applications alike. Recent developments in Earth Observation (EO) have indicated that SSM can be retrieved from different regions of electromagnetic spectrum, and numerous approaches have been proposed to facil ...
DOI:
10.1080/10106049.2018.1520926

12. Temporal stability of soil water content on slope during the rainy season in gully regulation watershed

Author:
Ma, Jianye; Han, Jichang; Zhang, Yang; Dong, Qiguang; Lei, Na; Liu, Zhe; Du, Yichun
Source:
Environmental earth sciences 2020 v.79 no.8 pp. 173
ISSN:
1866-6280
Subject:
soil water content,   etc   ; agricultural land; food security; prediction; soil depth; soil water; vegetation; water content; watersheds; wet season; China;     Show all 11 Subjects
Abstract:
... To increase reserve farmland resources, ensure food security, and to improve the ecological environment, large-scale gully regulation projects in Yan'an area of the Loess Plateau have been undertaken in China since 2013. Understanding the spatial and temporal distribution characteristics of slope soil moisture during the rainy season is, therefore, important for vegetation selection used in restor ...
DOI:
10.1007/s12665-020-08921-8

13. Evaluation of seasonal patterns of hydraulic redistribution in a humid subtropical area, East China

Author:
Sun, Long; Yang, Lei; Chen, Liding; Yen, Haw; Zhao, Fangkai; Li, Shoujuan
Source:
Hydrological processes 2020 v.34 no.4 pp. 1052-1062
ISSN:
0885-6087
Subject:
soil water content,   etc   ; camphor; growing season; humid zones; monitoring; peaches; roots; seasonal variation; soil water; summer; China;     Show all 11 Subjects
Abstract:
... Antecedent soil moisture or soil moisture status has a great impact on hydrological processes. Hydraulic redistribution (HR), a widely observed phenomenon, is defined as water distributed (typically at night) from moist soil to drier soil via plant roots, which plays an important role in soil moisture replenishment. Knowledge on seasonal patterns of HR and on the relationship between HR and soil w ...
DOI:
10.1002/hyp.13643

14. Telling a different story: The promote role of vegetation in the initiation of shallow landslides during rainfall on the Chinese Loess Plateau

Author:
Guo, Wen-Zhao; Chen, Zhuo-Xin; Wang, Wen-Long; Gao, Wen-Wang; Guo, Ming-Ming; Kang, Hong-Liang; Li, Peng-Fei; Wang, Wen-Xin; Zhao, Man
Source:
Geomorphology 2020 v.350 pp. 106879
ISSN:
0169-555X
Subject:
soil water content,   etc   ; adverse effects; forage; landslides; loess; rain; rhizosphere; topsoil; vegetation types; watersheds; wet season; China;     Show all 12 Subjects
Abstract:
... Vegetation is widely used for controlling landslides around the world; however, rainfall-induced shallow landslides occur frequently on vegetation-covered slopes on the Chinese Loess Plateau during the rainy season. To probe this phenomenon, we conducted on-site investigations and measurements in the Nanxiaohegou catchment on the Loess Plateau to explore the effects of soil properties and vegetati ...
DOI:
10.1016/j.geomorph.2019.106879

15. Analysis of compaction parameters of the exemplary non-cohesive soil determined by Proctor methods and vibrating table tests

Author:
Sulewska, Maria J.; Tymosiak, Dariusz
Source:
Annals of Warsaw University of Life Sciences, SGGW 2018 v.50 no.2 pp. 99-108
ISSN:
2081-9617
Subject:
soil water content,   etc   ; compliance; sand;     Show all 3 Subjects
Abstract:
... The purpose of the work is to analyze compaction parameters of non-cohesive uniformly graded soil – optimum moisture content (wₒₚₜ) and maximum dry density (ρdₘₐₓ), obtained from Proctor tests and using vibrating table. The research was conducted on even-graded medium sand (Safgr), of uniformity coefficient CU = 3.10 and coefficient of curvature CC = 0.99. Compaction parameters were examined by us ...
DOI:
10.2478/sggw-2018-0008

16. Intra-storm time stability analysis of surface soil water content

Author:
Gao, Xiaodong; Zhao, Xining; Pan, Daili; Yu, Liuyang; Wu, Pute
Source:
Geoderma 2019 v.352 pp. 33-37
ISSN:
0016-7061
Subject:
soil water content,   etc   ; data collection; prediction; rain; soil water;     Show all 5 Subjects
Abstract:
... Time stability analysis is an important and economical tool to upscale point soil water content (SWC) to larger scales. However, little is known whether and how precipitation affects characteristics of time stability of SWC during rainfall. Based on a high-resolution dataset, we found that medium- and heavy- rainfall events substantially reorganized spatial patterns of SWC, and that the time-stabl ...
DOI:
10.1016/j.geoderma.2019.06.001

17. Calculation of Critical Rainfall for Small-Watershed Flash Floods Based on the HEC-HMS Hydrological Model

Author:
Yuan, Wenlin; Liu, Meiqi; Wan, Fang
Source:
Water resources management 2019 v.33 no.7 pp. 2555-2575
ISSN:
0920-4741
Subject:
soil water content,   etc   ; floods; hydrologic models; rain; runoff;     Show all 5 Subjects
Abstract:
... The sudden occurrence and randomness of heavy rainstorms in hilly areas pose challenges to the identification of early warning indicators for mountain flash flood. This study explores the variation of critical rainfall under different rainfall patterns, mainly considering the effect of differences in the timing of peak rainfall (i.e., early, late or in the middle of the rainfall process). The HEC- ...
DOI:
10.1007/s11269-019-02257-0

18. Architectural design and performance evaluation of a zigbee technology based adaptive sprinkler irrigation robot

Author:
Bodunde, O.P.; Adie, U.C.; Ikumapayi, O.M.; Akinyoola, J.O.; Aderoba, A.A.
Source:
Computers and electronics in agriculture 2019
ISSN:
0168-1699
Subject:
soil water content,   etc   ; agricultural land; dry season; sprinkler irrigation; vegetation;     Show all 5 Subjects
Abstract:
... Irrigation is an assistive measure to salvage the problem of inadequate water for plantation and vegetation in dry places and during dry seasons. In this paper, the architectural design and performance evaluation of an adaptive sprinkler irrigation robot are presented. Two assemblies (transmitter’s and receiver’s modules) to be interfaced via a ZigBee communication were designed to enhance prototy ...
DOI:
10.1016/j.compag.2019.03.021

19. Combined effects of soil texture and machine operating trail gradient on changes in forest soil physical properties during ground-based skidding

Author:
NAGHDI, Ramin; SOLGI, Ahmad; LABELLE, Eric R.; NIKOOY, Mehrdad
Source:
Pedosphere 2020 v.30 no.4 pp. 508-516
ISSN:
1002-0160
Subject:
soil water content,   etc   ; bulk density; clay loam soils; coarse-textured soils; fine-textured soils; harvesting; porosity; sandy loam soils; soil texture; temperate forests; traffic;     Show all 11 Subjects
Abstract:
... Wood extraction by heavy machinery has always been associated with soil disturbance in mountain forests, and the degree of soil degradation is influenced by several factors, including site and soil characteristics, soil moisture, type of equipment used, and number of machine passes. The effects of ground-based skidding operations on the physical properties of soils with different texture were eval ...
DOI:
10.1016/S1002-0160(17)60428-4

20. Evaluation of the automated reference toolset as a method to select reference plots for oil and gas reclamation on Colorado Plateau rangelands

Author:
Di Stéfano, Sean; Karl, Jason W.; Bailey, Derek W.; Hale, Steven
Source:
Journal of environmental management 2020 v.265 pp. 110578
ISSN:
0301-4797
Subject:
soil water content,   etc   ; automation; biomass; land use; landowners; landscapes; oils; planning; plateaus; rangelands; remote sensing; rivers; soil texture; soil water; species diversity; topography; Colorado;     Show all 17 Subjects
Abstract:
... Rangelands are typically characterized by low precipitation and low biomass which makes them susceptible to disturbance and difficult to reclaim. These characteristics become a management issue when considering the widespread and significant impact of oil and gas development on rangelands. Reclamation from this land use involves the complexities of dealing with multiple state and federal agencies, ...
DOI:
10.1016/j.jenvman.2020.110578