Hydraulic conductivity

Part 1 of ebook "Soil physics with Python: Transport in the soil–plant–atmosphere system" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Basic physical properties of soil; Chapter 3 - Soil gas phase and gas diffusion; Chapter 4 - Soil temperature and heat flow; Chapter 5 - Soil liquid phase and soil–water interactions; Chapter 6 - Steady-state water flow and hydraulic conductivity; Chapter 7 - Variation in soil properties; Chapter 8 - Transient water flow;...

211p daonhiennhien 03-07-2024 1 1   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

This paper presents the results and assessment of the groundwater exploitation reserves in coastal areas of Ninh Thuan province. The research was based on determining the exploitation reserves of all grid cells with dimensions 500 m × 500 m distributed in fresh-salted water areas of the Holocene (qh) and Pleistocene (qp) aquifers. Each grid was assigned the corrected hydrogeological parameter values (depth, gravity coefficient, hydraulic conductivity, and drawdown level).

15p dianmotminh02 03-05-2024 7 2   Download

This study was conducted to carry out an independent thermal-hydraulic safety analysis for LB-LOCA of VVER-1200/491 and to investigate the agreement of the SAR conservative results with requirement stated in the IAEA Specific Safety Guide by using RELAP5/MOD 3.3 computer code with both conservative and best estimate approach.

10p visnape 30-01-2023 7 4   Download

High-level radioactive waste (HLW) disposal is considered to constitute a disposal system within a deep rock mass using deep geological repository. A deep geological disposal system has an engineered barrier system (EBS) consisting of canisters, buffer material, and backfill material.

8p vironald 15-12-2022 11 4   Download

Continued part 1, part 2 of ebook "Soil sampling and methods of analysis (Second edition)" provide readers with content about: soil organic matter analyses; soil physical analyses; soil water analyses; unsaturated hydraulic conductivity: laboratory tension infiltrometer; unsaturated hydraulic properties: field tension infiltrometer;...

644p hanlinhchi 11-11-2022 16 3   Download

This study was conducted to determine the effects of different position angles in twin-jet spray applications on droplet penetration of different nozzle types. Seven different nozzle types (standard flat fan, ST; narrow flat fan, STN; multirange, LU; lowdrift potential, AD; air-induction, IDK; twin-jet air-induction, IDKT) were used and nozzles were positioned +15° along the forward direction, perpendicular to ground surface 0˚ and reverse direction of forward –15°. Spray experiments at 100 L/ha constant application volume were conducted under controlled conditions of a closed facility.

10p hanthienngao 30-11-2021 10 1   Download

This study conducted a sensitivity analysis of physical models in RELAP5 code based on experimental data measured on the FEBA test facility. Sixteen physical models have been selected for sensitivity analysis to find the most important models that influence the calculation results. Based on two criteria, the maximum cladding temperature and the quench time, the sensitivity analysis results show that four physical models significantly impact the calculation result. Four chosen physical models are considered further in the next step of their uncertainty evaluation.

17p princessmononoke 29-11-2021 9 0   Download

It is essential to get information on clayey layers, which may play a significant role in protecting shallow aquifers thanks to their low hydraulic conductivity from surface contamination. One of the simple geophysical instruments is EM34 which applies the electromagnetic principle to read directly and quickly the apparent electrical conductivity of the subsurface.

6p vivacation2711 23-10-2021 18 1   Download

Drought stress is a major limiting factor of soybean [Glycine max (L.) Merr.] production around the world. Soybean plants can ameliorate this stress with improved water-saving, sustained N2 fixation during water deficits, and/or limited leaf hydraulic conductance.

18p viansan2711 30-07-2021 16 1   Download

Root hypoxia has detrimental effects on physiological processes and growth in most plants. The effects of hypoxia can be partly alleviated by ethylene. However, the tolerance mechanisms contributing to the ethylene-mediated hypoxia tolerance in plants remain poorly understood.

8p vijichea2711 28-05-2021 8 1   Download

Water deficiency is likely to become more frequent and intense as a result of global climate change, which may severely impact agricultural production in the world.

14p vijichea2711 28-05-2021 11 1   Download

Musculoskeletal disorders can reduce the quality of life and work capacity. The study assessed handgrip strength (HGS) in relation to low back pain and arthralgia in Kurdish men. Methods: This cross-sectional study was conducted using data from Ravansar non-communicable diseases (RaNCD) cohort study on 2164 men aged 35–65 years. HGS was measured using a hand-held hydraulic handgrip dynamometer.

8p vimariana2711 22-12-2020 8 1   Download

In order to assess the effect of balanced and imbalanced use of inorganic fertilizers and FYM in rice-wheat cropping system for twenty-nine years on physical soil quality indices after rice the observations were recorded from the continuing long-term fertility experiment initiated in 1984 at Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar.

8p caygaocaolon8 07-11-2020 9 1   Download

A study was conducted to ensure the impact of subsurface drainage system on salt affected soils in the UKP command area, Karnataka. The in-situ hydraulic conductivity with average of 0.067 m d-1 before sowing, and improved slightly (14.92%) after the harvesting to 0.077 m d-1 .

6p nguaconbaynhay8 13-10-2020 13 1   Download

The physical properties like porosity, water holding capacity, bulk density and soil moisture content was improved with the application of FYM (Choudhary and Kumar, 2013). Due to application of tanksilt to soil, bulk density (BD) and hydraulic conductivity of soil was decreased, Water holding capacity (WHC) and soil moisture content was increased (Jeyamangalam et al., 2012).

10p trinhthamhodang1215 23-09-2020 11 1   Download

The objective of current research work was to carry out field evaluation of sorghum harvester and also conduct the Pareto analysis of sorghum harvester to find out mechanical failure of various parts. The high workload, improper material selection of moving parts, improper clearance, maintenance and repair cause failure of component and many times equipment reliability issues were ignored. All the working components of machine required different level of maintenance throughout the life of machine.

4p trinhthamhodang1215 23-09-2020 11 1   Download

The experiment has been conducted to evaluate the hydraulic performance of the drippers fitted with drip irrigation system at experimental field of College of Agricultural Engineering under Dr. Rajendra Prasad Central Agricultural University, Pusa in Samastipur district (Bihar), India.

11p nguaconbaynhay7 15-08-2020 9 1   Download

An Investigation on physico-chemical properties, NPK and micro nutrient status of soils of Janpad major, Left bank canal, Nagarjuna Sagar Project (NSP), Telangana, India was carried. The soils are having clay content ranging from 6 to 24 per cent, silt content from 4 to 20 per cent and sand content from 69 to 87 per cent. The Hydraulic conductivity varied from 15 to 20 cm day-1 with a mean value of 17.5 cm day-1 . Mostly the soils under the command area are slightly acidic to slightly alkaline and non-saline in nature.

9p angicungduoc6 22-07-2020 9 1   Download

One of the easiest and efficient way of water conservation to solve drinking water scarcity is rooftop water harvesting. To evaluate the performance of the first flush with micromesh filter system, inflow and outflow of the rooftop water samples were analysed for pH, EC, TDS, SAL and TSS parameters. In general, the PH, electrical conductivity, and TDS of the roof water samples were within the drinking water standards and the first flush with micromesh filter system was found to reduce TDS values.

9p chauchaungayxua6 26-06-2020 15 2   Download