soil type Articles
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Simplification of Soil Classification Charts Derived from the Cone Penetration Test
This paper presents a semi-empirical approach to simplify existing CPT and PCPT soil classification charts. This approach is based on two tendencies in current charts, namely soil type and in situ soil state. These charts may be simplified into one-dimensional soil classification systems by linear conformal mapping. Accordingly, several charts are simplified, and a comparison to in situ testing ...
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Discover 3 Top Treatments For the Chemical Stabilization of Soil
Chemical stabilization of soilimproves the strength parameters of soil and increases its bearing capacity in road construction. New techniques in this process help companies prevent the costly problems of soil erosion. What Is the Chemical Stabilization of Soil? Simply put, chemical stabilization of soil involves adding chemicals to the soil to change the soil structure. This process helps ...
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Effects of benzo[a]pyrene on growth, the anti‐oxidant system and DNA damage in earthworms (Eisenia fetida) in two different soil types under laboratory conditions
The aims of the present study were to compare the toxic effects of benzo[a]pyrene (BaP) and to screen for rapid and sensitive biomarkers that can be used to assess the environmental risks of benzo[a]pyrene in earthworms in different natural soil types. We exposed Eisenia fetida to two types of soil (red soil and fluvo‐aquic soil) spiked with different concentrations (0, 1, 10, 100 and 500 mg ...
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Degradation rate of sodium fluoroacetate in three New Zealand soils
The degradation rate of sodium fluoroacetate (SFA) was assessed in a laboratory microcosm study incorporating three NZ soil types under different temperature (5, 10 or 20 °C) and soil moisture (35% or 60% water holding capacity) conditions using OECD Guideline 307. A combination of non‐labelled and radio‐labelled 14C‐SFA was added to soil microcosms, with sampling and analysis protocols for ...
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Yukon Territory Project— 100km South of Arctic Circle - Case Study
Project Details: 2,000 tons of impacted soil. Diesel range organic contamination (up to 22,000 mg/kg). Soil type: gravel to tight clay with high moisture content. Very limited infrastructure was onsite. ...
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Patterns of plant species richness along the drawdown zone of the Three Gorges Reservoir 5 years after submergence
This study was conducted to understand the patterns of plant species richness in the Three Gorges Reservoir after 5 years after 175 m submergence. We hypothesized that hygrophyte and xerophyte species would show different species richness patterns, which was tested by collecting species composition and environmental variable data in 50 m long and 5 m wide transects in the drawdown zone from ...
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Landfill site characterisation at Kham Bon village, Muang district, Khon Kaen province, NE Thailand
The aim of the study is to characterise the Kham Bon landfill site. Hydrogeological and geochemical surveys were conducted and four boreholes were drilled. The hydraulic properties of the aquifer were tested, and soil, surface water and groundwater samples were collected at various times in the year. The physical and chemical properties of the samples, especially heavy metals, were analysed. The ...
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Integration of the Pesticide Impact Rating Index with a Geographic Information System for the Assessment of Pesticide Impact on Water Quality
The pesticide impact rating index (PIRI) has been integrated with a Geographic Information System (GIS) to enable regional assessment of pesticide impact on groundwater and surface water resources. The GIS version of PIRI (PIRI-GIS) was used to assess the impact of pre-planting atrazine use in the pine plantations on the Gnangara Mound, Western Australia. The impact on groundwater was found to be ...
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Helical Probe Tests: Initial Test Calibration
Helical test probes of different sizes suitable for shallow (1.8-m) in-situ soil exploration and compaction control were developed and tested in different soils alongside traditional in-situ tests, including Standard Penetration tests (SPT), cone penetration tests (CPT), dilatometer tests (DMT), and in-situ density tests. The helical probe test (HPT) is a quick and economical test, which can be ...
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Integration of the Pesticide Impact Rating Index with a Geographic Information System for the Assessment of Pesticide Impact on Water Quality
The pesticide impact rating index (PIRI) has been integrated with a Geographic Information System (GIS) to enable regional assessment of pesticide impact on groundwater and surface water resources. The GIS version of PIRI (PIRI-GIS) was used to assess the impact of pre-planting atrazine use in the pine plantations on the Gnangara Mound, Western Australia. The impact on groundwater was found to be ...
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Use of CPTu to Estimate Equivalent SPT N60
Although the CPTu offers many advantages over the SPT, it may be desirable in some instances to use SPT-based experience of soil behavior. An algorithm is presented here for estimation of equivalent N60 values directly from the CPTu without resort to soil sampling. The proposed algorithm is based on data and trends reported in the literature; the algorithm is tested against new data obtained for ...
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Modeling the hydrologic and economic efficacy of stormwater utility credit programs for US single family residences
As regulatory pressure to reduce the environmental impact of urban stormwater intensifies, US municipalities increasingly seek a dedicated source of funding for stormwater programs, such as a stormwater utility. In rare instances, single family residences are eligible for utility discounts for installing green infrastructure. This study examined the hydrologic and economic efficacy of four such ...
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Effect of activated carbon or biochars on toxicity of different soils contaminated by mixture of native polycyclic aromatic hydrocarbons and heavy metals
Activated carbon (AC) and biochars (BCS and BCW) were added to the soils sampled from areas of strong anthropogenic influence at doses of 0.5, 1, 2.5 or 5% (w/w) and incubated for two months. At the end of this period, the toxicity of the soils was measured. The effect of AC and biochars on the toxicity of the soils varied based on soil, type of amendment, dose and test organism. For most of ...
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SMOS soil moisture data validation in the Aurajoki watershed, Finland
Soil Moisture and Ocean Salinity (SMOS) level 2 soil moisture observations were validated by the soil moisture simulations of the Watershed Simulation and Forecasting System (WSFS) in the Aurajoki watershed located in Southwest Finland. The validation period included summer seasons 2010–2012. A new 2-layer soil moisture model was developed to simulate soil moisture in two layers, 10 cm ...
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Whats Best for my application? Trommel or Deck Screen
We have been getting lots of calls regarding soil screening and recycling over the past month, one only assumes its in preparation for oncoming good weather (when will it be here?) and a lot of our customers have been asking what mesh is best with regards to screening topsoil, and soil type materials. Firstly, the tool to ...
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Development and testing of the HYPE (Hydrological Predictions for the Environment) water quality model for different spatial scales
The HYPE model is a hydrological model for small-scale and large-scale assessments of water resources and water quality, developed at the Swedish Meteorological and Hydrological Institute during 2005–2007. In the model, the landscape is divided into classes according to soil type, land use and altitude. In agricultural lands the soil is divided into three layers, each with individual computations ...
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Case study – BTEX contamination - Colorado
Site: Former Gas Station (Colorado) Contaminant: BTEX Soil Type: Silty Clays Injection Cost: $8,500 (material & labor) Treatment Area (before): approximately 400 sq. ft. Thickness: 16 to 22 feet bgs Plume Area (after): All contaminates are below groundwater standards Groundwater: varies from 16 to 18 feet ...
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A Batch-Type Testing Method for Determination of Adsorption of Gaseous Compounds on Partially Saturated Soils
As part of this study, a laboratory batch-type testing method has been developed for determination of the adsorptive characteristics and equilibrium adsorption coefficients for gaseous chemical species on partially saturated soils. The testing procedure was originally developed in support of in-situ tests at radioactive waste disposal sites in which relatively inert tracer gases are injected into ...
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Thermally activated persulfate oxidation of NAPL chlorinated organic compounds: effect of soil composition on oxidant demand in different soil-persulfate systems
This study investigates the interaction of persulfate with soil components and chlorinated volatile organic compounds (CVOCs), using thermally activated persulfate oxidation in three soil types: high sand content; high clay content; and paddy field soil. The effect of soil composition on the available oxidant demand and CVOC removal rate was evaluated. Results suggest that the treatment ...
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Case study – PCE contamination pilot study
Site: Dry Cleaner (North Carolina) Contaminant: PCE Soil Type: Saprolite Injection Cost: $35,000 (material & labor) Pilot Treatment Area: approximately 1460 sq. ft. Thickness: 11 to 41 feet bgs Injections: 16 per borehole Groundwater: varies from 13 to 15 feet bgs Site Status: Preparing to proceed with full site treatment – October ...
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