Layered soil

Part 2 of ebook "GIS applications in agriculture" provides readers with contents including: Chapter 6 - Map quality assessment for site-specific fertility management; Chapter 7 - Gleaning more information from yield data; Chapter 8 - Soil salinity mapping using ArcGIS; Chapter 9 - Using GIS and on-the-go soil strength sensing technology for variable-depth tillage assessment; Chapter 10 - Collocating multiple self-generated data layers;...

103p daonhiennhien 03-07-2024 1 1   Download

Part 1 of ebook "Elastic solutions for soil and rock mechanics" provides readers with contents including: Chapter 1 - Fundamental definitions and relationships; Chapter 2 - Basic solutions for concentrated loading; Chapter 3 - Distributed loads on the surface of a semi-infinite mass; Chapter 4 - Distributed loading beneath the surface of a semi-infinite hass; Chapter 5 - Surface loading of a finite layer underlain by a rigid base; Chapter 6 - Surface loading of multi-layer systems; Chapter 7 - Rigid loaded areas;...

204p giangdongdinh 28-05-2024 3 2   Download

Ebook "The bearing capacity of building foundations" describes the different ways of ultimate bearing capacity determination of building foundations. This four-chapter book considers the effect of a horizontal force acting on a foundation. It also examines a situation where, beneath the foundation level in the zone of influence of the foundation there are two layers of soil, including the case where the second, lower layer is formed by incompressible rock.

232p giangdongdinh 28-05-2024 3 2   Download

Soil water in the coastal zones is more vulnerable to salinization. Soil-water vulnerability assessment is an effective tool for soil-water management. This study used the DRASTIC model, which is based on seven factors viz: Depth to soil water, recharge, soil-water bearing layer, soil media, topography, impact of root zone, and hydraulic conductivity to evaluate soil-water salinization potentiality of Ben Tre province.

10p dianmotminh02 03-05-2024 2 1   Download

In this article, the authors use Plaxis 2D software to simulate triaxial testing that shows the behavior of the geogrid reinforced soil structures under the effect of loads. Based on the Mohr - Rankine limit equilibrium conditions, the apparent cohesion generated by the geogrid layers is determined.

11p viengels 25-08-2023 5 3   Download

The organic dyes have beenwidely used in the textile industry for last decades. Nowadays, they have also known as toxic and polluted compounds because of their high persistence in soil sediments and water resources. These chemicals may be degraded to the carcinogens and toxic products under sunlight irradiation, affecting aquatic life and ecosystem.

9p viberbers 09-08-2023 4 2   Download

This article presents the method for training a deep artificial neural network (DANN) for regression analysis; this method is based on the generalized delta rule. To illustrate the rule, a DANN with two hidden layers is used. The model’s construction is described in the form of mathematical equations. Subsequently, a DANN program is written in Visual C# .NET. This program is tested with the task of estimating the shear strength of soil samples.

8p nhanchienthien 25-07-2023 7 4   Download

Continued part 1, part 2 of ebook "Advanced geotechnical analyses: Developments in soil mechanics and foundation engineering-4" has presents the following content: finite deformation analysis of soil penetration problems; analysis of the dynamics of pile driving; finite layer methods in geotechnical analysis; the explicit finite difference technique applied to geomechanics;...

229p dieptieuung 19-07-2023 5 3   Download

The indicators of climate change in Central Europe, Hungary is showing a trend of decrease in rainfall, increase in temperature and especially extreme weather that is becoming more usual and unpredictable. The current study presents the application of the MIKE SHE model to examine the role of unsaturated soil settings and the effects of climate change on various hydrological parameters and water balance components.

18p viironman 02-06-2023 5 2   Download

Root is the prime organ that sucks water and nutrients from deep layer of soil. Wild barley diversity exhibits remarkable variation in root system architecture that seems crucial in its adaptation to abiotic stresses like drought. In the present study, we performed quantitative trait locus (QTL) mapping of root and related shoot traits under control and drought conditions using a population of wild barley introgression lines (ILs).

12p vinarcissa 21-03-2023 4 1   Download

During the past decades, extensive parts of the Quercus brantii woodlands in the Zagros Mountains declined in size and habitat quality. We aimed to explore the variation of oak woodlands in the southern Zagros Mountains and to assess the vulnerability. We examined 49 plots at different altitudes and aspects, recorded the vascular plant species for tree and herb-layer composition, and collected data on topographic and edaphic factors.

17p lyhuyenthu 31-01-2023 3 2   Download

In this study, archaeobotanical data were gathered from the Early, Middle, and Late Bronze Age layers (2400–1200 BC) of the Tatarlı Höyük exposed in the 2011–2012 excavation seasons in the Ceyhan district of Adana Province were evaluated. In 8 trenches relating to these periods, archaeological contexts such as inside areas, hearths, ovens, middens, ceramic pots, etc., as well as contexts with carbonized plant remains were recovered by using dry and wet sieving methods, corresponding in total to 90 soil samples.

17p lyhuyenthu 31-01-2023 6 3   Download

In paper "Fine root vertical-seasonal distribution of Robinia pseudoacacia in relation to abiotic factors in a chronosequence in coastal saline alkali land of the Yellow River Delta, China", FRB, FRL, FRSA, SWC and soil nutrients increased, while SRL and SSC decreased with increasing stand age. Vertically, fine roots were concentrated in a 0–20 cm soil layer. SRL, SWC and SSC increased, while soil nutrients decreased with increasing soil depth.

18p lyhuyenthu 31-01-2023 5 2   Download

As Dam-IT has some effects on reducing seepage flow, therefore it is satisfactory to remediate earthen dam. The result ranges in broad spectrum because applying Dam-IT depends on sample soil layer and its mechanism in different inclined planes on upstream slope.

3p vipagani 20-10-2022 2 2   Download

The study was carried out to estimate the average annual soil erosion and risk area in the Uttarakhand State of Indian Himalayan region using various high-resolution geospatial data layers such as Global rainfall erosivity database, SOILGRIDS, CartoDEM as well as LULC data by employing Revised universal soil loss equation (RUSLE) model in a GIS environment.

14p thebadguys 15-01-2022 14 0   Download

Based on the combined positive matrix factorization-health risk (PMF-HR) model, industry, combustion, and traffic emission contributed the most to the health risk of Cr and Cd, followed by soil parent material layer. Our study provided a reliable method to calculate the bioaccessible heavy metal health risk and determine each potential source’s contribution to health risk.

9p thebadguys 15-01-2022 10 0   Download

The use of spun concrete piles under geological layer that has the thick soft soil layer reveals many flaws, many incidents of tilting pile or broken pile have occurred during construction process in many projects, cause great damage to the cost of the project as well as the slow construction progress. In this paper, the author analyzes the causes inclined piles during construction of spun concrete piles, as well as provide the method to determine the inclination of the pile along the pile body.

6p sotritu 18-09-2021 9 1   Download

The paper presents a series of modified direct shear tests to investigate the interface shear strength between clay and nonwoven geotextile under different normal stresses and degrees of saturation. The modified direct shear apparatus consists of a 60 mm × 60 mm square shear box assembly with a 60 mm × 60 mm acrylic block inserted in the bottom shear box. A woven geotextile layer was glued to the top of the acrylic block, while the top shear box was filled by the compacted clayey soil.

14p chauchaungayxua12 09-07-2021 17 1   Download

Purposes of the topic: To define the variation pore water pressure and deformation (settlement) of soft soil layer during vacuum consolidation. To establish the relationship between Plasticity Index (PI), degree of consolidation (U), thickness of improved soft soil layer (H), and consol.

27p dolphintaletale 23-04-2021 21 7   Download

The aim of research: Determination of greywater characteristics from some buildings in Hanoi city; Explaination of the principle of removing the main pollutants out of greywater by using laterite with multi soil layering engineering; Determination of decomposition rate coefficients of BOD5, COD and NH4 + -N. The number of laterite layer is calculated based on these coefficients; Successful greywater treatment from building by using laterite with Multi Soil Layering engineering and the treated effluent meet up the National Regulations

27p dolphintaletale 23-04-2021 16 7   Download