How to estimare percolation and seepage with Darcy's law when studying the farm field or farm pond?
Best insight from top research papers
When studying percolation and seepage in farm fields or farm ponds, Darcy's law is a fundamental tool for estimating water flow through porous media. Darcy's law, a linear flow model, is essential for understanding groundwater movement. However, it is crucial to recognize that Darcy's law represents a special case of non-Darcy flow, which is prevalent in practical engineering applications. The application of Darcy's law can be extended to estimate discharge rates, velocity, and total discharge through porous media, with the discharge rate being influenced by factors such as porosity. Additionally, the transition from Darcy flow to Forchheimer flow may be necessary in highly permeable rock formations to accurately model seepage behavior. Therefore, utilizing Darcy's law alongside considerations of non-Darcy flow characteristics can provide a comprehensive understanding of percolation and seepage dynamics in agricultural settings.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
| To estimate percolation and seepage in farm fields or ponds using Darcy's law, calculate discharge rate, velocity, and total discharge based on medium porosity and specific storage. | |
| Darcy's law can estimate percolation and seepage in farm fields or ponds, but the study suggests that nonlinear laws may apply, especially as Reynolds number increases. | |
| Not addressed in the paper. | |
| Not addressed in the paper. | |
| Darcy's law can be used to estimate percolation and seepage in farm fields or ponds by relating pressure gradient, hydraulic conductivity, and flow rate of water through porous media. |
Related Questions
What soil percolation test?4 answersA soil percolation test is a method used to determine the water absorption rate of soil. It is commonly used in the preparation of septic drain fields or infiltration basins for buildings. The test involves measuring the rate at which water passes through the soil under controlled conditions. Different techniques and devices can be used for conducting the test, such as the Digital Percolation Meterand the up-flow column percolation test. The Digital Percolation Meter is a device that provides a direct reading of the water level in the test hole, making it easier to determine the water absorption rate. The up-flow column percolation test is a laboratory-scale test that assesses the leaching behavior of hazardous substances from contaminated soils over time. This test involves percolating a solution through compacted soil contained in a column and analyzing the eluate samples for target elements.
Water infiltration into the ground ?4 answersWater infiltration into the ground is a crucial process that has been extensively studied in various fields such as hydrology, agriculture, and urban soils. Infiltration refers to the movement of water into the soil, and its rate is measured in centimeters or millimeters per hour. Different models, such as the Green-Ampt model, Kostiakov model, Horton model, and Philips model, have been used to estimate the infiltration rate. The process of infiltration can occur horizontally or vertically, and it is influenced by factors such as soil type, hydraulic conductivity, and soil water diffusivity. Infiltration is important for the supply of water to the soil root zone and can be affected by factors such as rain rate, entrapped air, and initial soil-water content. Methods such as 2-D Resistivity Imaging and Ground Penetrating Radar have been used to investigate water infiltration in the subsurface layer of the soil.
What are the limitations of Darcy's law?5 answersDarcy's law, which describes fluid flow in porous media, has limitations that have been explored in the literature. Forchheimer's equation was introduced to account for pressure loss due to inertial forces near the wellbore region, where Darcy's law is not applicable. Additionally, the Darcy-Buckingham law, which is critical for predicting unsaturated flow, has been tested on porous rocks and found to be valid under the tested conditions. However, traditional reservoir modeling approaches fail to capture the sub-micron mechanisms that govern fluid flow in tight oil reservoirs, leading to inaccuracies in tight oil reservoir simulators. Further investigation is needed to understand the factors that affect sub-micron fluid mobility and to improve the accuracy of sub-micron pressure dynamics and flow velocity. In summary, the limitations of Darcy's law include its applicability near the wellbore region and its inability to accurately model fluid flow in sub-micron pores.
Does seepage affect drainage density?3 answersSeepage can affect drainage density by influencing the design and effectiveness of drainage systems. In the study by Shao Mingguang and Liu Chunting, a diversion open channel anti-seepage drainage system was proposed to solve problems such as bulging, damage, and collapse of the channel in prior designs. Fang Ran Zhao, Zi Liang Cai, and Tian Wang Zhang studied the adjustment relationship between seepage build capacity and rain convergence to reduce the pressure of rain efflux in airports. Yi-Feng Chen, Chuangbing Zhou, and Hong Zheng proposed a numerical solution based on the Finite Element Method to accurately characterize the boundary conditions of complex drainage systems. Chen Jian-yu presented a hydraulic model for unsaturated drainage substructure, which considers boundaries like rainfall infiltration. Andrew C. Larson, Lowell E. Gentry, Mark B. David, Richard A. Cooke, and David A. Kovacic found that seepage through and under an earthen berm in constructed wetlands can serve as a pathway for NO3-N transport, enhancing overall NO3-N removal efficiencies.
Does seepage affect stream density?5 answersSeepage can affect stream density. Experimental works have shown that seepage modifies the water-sediment interaction and affects the velocity field and turbulence dynamics of open-channel flow. Field observations and flume experiments indicate that seepage through a stream bed can cause changes in form drag and surface drag on grains, but these changes may not result in a measurable change in the slope of the water surface. Additionally, stream seepage has been found to have an effect on flood routing, with the water level falling and the peak value at the same section being postponed as discharge decreases. Therefore, seepage can alter the dynamics of stream flow and potentially impact stream density.
How will runoff from farm affect water quality?2 answersRunoff from farms can have a negative impact on water quality. The increasing proportion of agriculture in a catchment can lead to a decline in water quality, with losses of nutrients and sediment being key indicators of poor water quality. Agricultural runoff contains sediments, nutrients, pesticides, and microbes that contribute to water quality problems. Farm management practices need to focus on water quality in both surface water and groundwater systems, as they are interrelated. Agricultural runoff is a nonpoint source of water pollution, and controlling it requires greater technological, economic, and administrative efforts compared to point sources. Agriculture also affects runoff processes, particularly soil surface conditions and infiltration capacity, leading to increased runoff and potential erosion. Overall, runoff from farms can have detrimental effects on water quality, and strategies and regulations are needed to mitigate these impacts.