A method for measurement of effective porosity in porous rock and soil media based on radon diffusion

2021 ◽  
Author(s):  
Qibin Luo ◽  
Yaxin Yang ◽  
Hongtao Ning ◽  
Xinmin Wu ◽  
Chen Fu ◽  
...  
Keyword(s):  
Effective Porosity ◽  
Porous Rock ◽  
Radon Diffusion ◽  
Soil Media ◽  
Rock And Soil

Analysis on Mechanism of Coupling Fields of Seepage and Stress and its Modeling

2014 ◽  
Vol 919-921 ◽  
pp. 1211-1215
Author(s):  
Fei Han Wang ◽  
Guo Xin Yan ◽  
De Jun Zhao
Keyword(s):  
Mathematical Model ◽  
Stress Field ◽  
Stress Fields ◽  
Coupling Mechanism ◽  
Seepage Field ◽  
Soil Media ◽  
Rock And Soil ◽  
System Analyzing

In rock and soil media, seepage and stress fields are interacting and interrelated system. Analyzing on mechanism of seepage field acting on stress field and on mechanism of stress field acting on seepage field in rock and soil media, it established mathematical model of seepage field with stress field acting on and mathematical model of stress field with seepage field acting on. According to coupling mechanism, it gave mathematical model of coupling seepage field and stress field and corresponding steps of FEM

scholarly journals The Comparative Study on the Damage Zones of Cylindrical and Spherical Charges in Rock and Soil

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Qian Xu ◽  
Zhong-Qi Wang
Keyword(s):  
Numerical Simulation ◽  
Comparative Study ◽  
Spherical Model ◽  
Characteristic Dimension ◽  
Exponential Expansion ◽  
Soil Media ◽  
Different Shapes ◽  
Cavity Development ◽  
The Comparative Study ◽  
Rock And Soil

To compare the damage zones of spherical and cylindrical charges in rock and soil, a quasistatic spherical model was established to predict the characteristic dimension of the cavity. The results indicated that the damage zones of cylindrical charges were larger than those of spherical charges. Furthermore, the cavity development of two charges with different shapes was obtained by numerical simulation, and a comparison of the prediction results between the quasistatic model and numerical simulation was made. The comparison showed that the model could predict the damage zones exactly and faster than numerical simulation. Ultimately, the influence of explosions and soil media was discussed by the quasistatic model. It was observed that larger damage zones were generated by smaller values of the product of pressure and exponential expansion. However, the influence of soil media was complex, and larger damage zones were usually generated by the harder soil media.

Detection of Subsurface Voids in Soil Media Using Seismic Wave Methods

2016 ◽  
Vol 3 (1) ◽  
pp. 1-16
Author(s):  
J. Laman ◽  
◽  
A. Srivastava ◽  
A. Schokker
Keyword(s):  
Seismic Wave ◽  
Soil Media ◽  
Wave Methods

Groundwater storage in Africa

2017 ◽  
Author(s):  
Gabin Archambault
Keyword(s):  
High Resolution ◽  
Effective Porosity ◽  
Data Sources ◽  
Groundwater Storage ◽  
British Geological Survey ◽  
Full List ◽  
The World ◽  
Storage Type ◽  
Porosity Range ◽  
Aquifer Flow

This 5 km resolution grid presents groundwater storage in Africa (in mm). This parameter was estimated by combining the saturated aquifer thickness and effective porosity of aquifers across Africa. For each aquifer flow/storage type an effective porosity range was assigned based on a series of studies across Africa and surrogates in other parts of the world. Groundwater storage is given in millimeters. Detailed description of the methodology, and a full list of data sources used to develop the layer can be found in the peer-reviewed paper available here: http://iopscience.iop.org/article/10.1088/1748-9326/7/2/024009/pdf The raster and a high resolution PDF file are available for download on the website of British Geological Survey (BGS): http://www.bgs.ac.uk/research/groundwater/international/africanGroundwater/mapsDownload.html Groundwater Storage

The Application of Organic Plant Media Composition on Indian Mustard Crops (Brassica Juncea L) in Polybag

2019 ◽  
Vol 1 (1) ◽  
pp. 16-22
Author(s):  
Nora Augustien ◽  
Pawana Nur Indah ◽  
Purnawati Arika ◽  
Irsyad Irsyad ◽  
Hadi Suhardjono
Keyword(s):  
Urban Communities ◽  
Urban Areas ◽  
Indian Mustard ◽  
Vegetable Crops ◽  
Sustainable Food ◽  
Mustard Plant ◽  
Soil Media ◽  
Wet Weight ◽  
Number Of Leaves ◽  
The Right

Indian mustard plants are the main vegetable crops consumed by urban communities. The need for this vegetable increases along with the increase in culinary tourism in each region and the government's appeal on sustainable food home. One effort made to meet the needs of vegetable mustard in urban areas can be cultivated using polybags. The main problem of vegetable cultivation on polybags is the availability of soil media. To overcome the limitations of soil media it is attempted to substitute it with organic litter enriched with MOL (local microorganisms). The purpose of research is to find the right combination of planting media for mustard plants. The results showed that the composition of K7 = soil: compost: litter of hay: litter of maize (2: 1: 1: 1) best on plant length, number of leaves, length of root leaves and number of roots while the wet weight of mustard plant (g) K7 = soil: compost: litter of maize: litter of corn (2: 1: 1: 1) and K8 = soil: compost: litter of maize: litter of maize: cocopeat (2: 1: 1: 1: 1) or soil: compost + urea. Increased weights of wet mustard by 63% compared to soil media and 20% compared to soil composition: compost + urea. Organic straw in the form of straw: litter of corn stalk: cocopeat enriched with MOL are able to become ready-made planting media on the cultivation of indian mustard plants in polybags.

MULTIPLE APPROACHES TO QUANTIFYING EFFECTIVE POROSITY OF THE DEVONIAN-AGED WOODFORD SHALE IN OKLAHOMA

2020 ◽  
Author(s):  
Chen Zhao ◽  
◽  
Hu Qinhong ◽  
Qiming Wang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Effective Porosity ◽  
Woodford Shale
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