Water Retention
Water Retention - Related Videos
03:10
Soil Core Sample Collection for Water Retention Property Analysis
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2026
Source:Alessia J. Marchesan1, Guillermo Hernandez Ramirez11Renewable Resources, University of Alberta. This video demonstrates the technique for collecting a soil sample for hydraulic property analysis. The sampling area is cleared, and the top crust is evacuated. The sampling ring is then placed into the soil to collect the sample. The ring with the sample is then cleaned, labeled, packed, and transferred undisturbed for analysis.
04:55
Immobilization of Live Caenorhabditis elegans Individuals Using an Ultra-thin Polydimethylsiloxane Microfluidic Chip with Water Retention
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Cited by 15 •
2019
A series of immobilization methods has been established to allow the targeted irradiation of live Caenorhabditis elegans individuals using a recently developed ultra-thin polydimethylsiloxane microfluidic chip with water retention. This novel on-chip immobilization is also adequate for imaging observations. The detailed treatment and application examples of the chip are explained.
02:42
Determination of the Calcium Retention Capacity of Isolated Mitochondria
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2025
This video demonstrates the procedure to assess mitochondrial calcium retention capacity by monitoring real-time changes in fluorescence as mitochondria uptake calcium. This assay is useful for studying mitochondrial function and calcium-related processes, including apoptosis and neurodegenerative diseases.
11:01
Ferromagnetic Bare Metal Stent for Endothelial Cell Capture and Retention
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Cited by 12 •
2015
Our goals were to design, manufacture and test ferromagnetic stents for endothelial cell capture. Ten stents were tested for fracture and 10 more stents were tested for retained magnetism. Finally, 10 stents were tested in-vitro and 8 more stents were implanted in 4 pigs to show cell capture and retention.
05:53
Mitochondrial Ca2+ Retention Capacity Assay and Ca2+-triggered Mitochondrial Swelling Assay
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Cited by 11 •
2018
This protocol aims to describe a method to examine the Ca2+ retention capacity and Ca2+- triggered mitochondrial swelling of isolated mitochondria of SH-SY5Y cells step-by-step.
FAQs
Water retention depends strongly on pore size and connectivity. Small or poorly connected pores can hold water through capillary forces, while larger or more continuous pathways permit faster movement. Surface tension at water interfaces helps sustain these forces, so engineers consider the internal structure of soils and other porous materials when predicting drainage, storage, and moisture availability.
Adsorption retains water by associating it with material surfaces, whereas a physical barrier limits movement by obstructing a drainage or evaporation pathway. These mechanisms act differently from pore-based storage, although a system may combine them. Distinguishing the dominant mechanism helps engineers select moisture-control materials or structural features suited to limiting loss without assuming all retained water behaves identically.
Retaining water can improve resource efficiency and support plant growth, but engineered systems also need controlled movement to manage runoff, drainage, and changing environmental conditions. This balance is important in soils, reservoirs, drainage layers, and green roofs, where moisture behavior can affect erosion control, infrastructure stability, and overall system performance. The target is managed storage, not simply maximum storage.
When applying water retention principles, engineers should examine the system’s material or structural features, the mechanism expected to hold water, and the pathway through which water might drain or evaporate. They can then match retention behavior to the intended outcome, such as reducing runoff, supporting vegetation, improving resource efficiency, or maintaining infrastructure performance under changing environmental conditions.
Applications span soils, reservoirs, drainage layers, green roofs, irrigation systems, and moisture-control materials. In soil and planting contexts, retained water can support plant growth; in drainage and reservoir settings, it can help manage water movement and runoff. Green roofs and engineered materials extend the same principle into building and infrastructure design, where moisture management contributes to system performance.
Engineers can incorporate retention features that hold water longer and reduce its rapid movement across or through a system. This approach can reduce runoff and erosion while improving water-use efficiency. The appropriate arrangement depends on whether the design emphasizes soil moisture, reservoir storage, drainage control, green-roof performance, or irrigation. Evaluating the resulting water movement indicates whether the system meets its purpose.
Changing environmental conditions can alter how water enters, moves through, or leaves an engineered system. Retention principles give engineers a basis for managing those shifts rather than treating moisture as a fixed condition. This matters for infrastructure stability and performance, as well as for systems that depend on reliable water availability, including irrigation, green roofs, soils, and reservoirs.