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  2. Pulse-repetition frequency - Wikipedia

    en.wikipedia.org/wiki/Pulse-repetition_frequency

    Signals propagate at the speed of sound in the medium (almost always water), and maximum PRF depends upon the size of the object being examined. For example, the speed of sound in water is 1,497 m/s, and the human body is about 0.5 m thick, so the PRF for ultrasound images of the human body should be less than about 2 kHz (1,497/0.5).

  3. Flood management - Wikipedia

    en.wikipedia.org/wiki/Flood_management

    Even slightly blunting the spike significantly decreases the peak flood level. Generally, the higher the peak flood level, the more flood damage is done. Modern flood control seeks to "slow the flow", and deliberately flood some low-lying areas, ideally vegetated, to act as sponges, letting them drain again as the floodwaters go down.

  4. Does homeowners insurance cover water damage? - AOL

    www.aol.com/finance/does-homeowners-insurance...

    According to the Insurance Information Institute (Triple-I), the cost of water damage to homeowners between 2017 and 2021 averaged $12,514. What’s worse, this type of damage is common. What’s ...

  5. 'It's going to destroy our city.' Cost of flood protection on ...

    www.aol.com/going-destroy-city-cost-flood...

    It's the seventh time in the conservancy's 109-year history that the conservancy's cost to property owners has been reassessed. ... formula of how much water the 1913 flood covered on each ...

  6. Freshwater acidification - Wikipedia

    en.wikipedia.org/wiki/Freshwater_acidification

    Diagram depicting the sources and cycles of acid rain precipitation. Freshwater acidification occurs when acidic inputs enter a body of fresh water through the weathering of rocks, invasion of acidifying gas (e.g. carbon dioxide), or by the reduction of acid anions, like sulfate and nitrate within a lake, pond, or reservoir. [1]

  7. Guide to homeowners insurance - AOL

    www.aol.com/finance/guide-homeowners-insurance...

    Water backup coverage: This endorsement provides coverage if your home’s sewer or water lines backup into the drain, toilets or showers from issues like clogged pipes or broken drains. These ...

  8. Waterproofing - Wikipedia

    en.wikipedia.org/wiki/Waterproofing

    In construction, a building or structure is waterproofed with the use of membranes and coatings to protect contents and structural integrity. The waterproofing of the building envelope in construction specifications is listed under 07 - Thermal and Moisture Protection within MasterFormat 2004, by the Construction Specifications Institute, and includes roofing and waterproofing materials.

  9. Wellhead protection program - Wikipedia

    en.wikipedia.org/wiki/Wellhead_protection_program

    The most beneficial aspects of introducing a Wellhead Protection Plan are the reliable drinking water sources for the future, and cost-savings. Developing a protection plan effectively prevents groundwater contamination, which saves the money that would potentially be spent on clean-up processes; clean-up methods can be 30-40 times more costly ...