Weight of river rock = 0.63 m 3 * 1,788 kg/m 3 Weight of river rock = volume needed * density of river rock Going back to the computations, to know how heavy this volume of pea gravel is, we evaluate its weight using the equation below: Nevertheless, when using our river rock calculator, you can easily change its units by just clicking or tapping on its units and selecting the unit you want. If you need the volume in cubic feet or cubic yards, you can use our volume converter for the conversion. Volume needed = (area * depth) * (1 + wastage) Using the formula we have and considering a 5% contingency or wastage, we estimate our needed river rock volume as follows: Let's say we want to make a 7.5-cm thick pea gravel (density = 1,788 kg/m 3) walkway with a width of 80 centimeters (0.8 m) and a length of 10 meters. However, the environment needs these stones too, so we have to know how much river rock we need to purchase to help conserve what we have. Other than that, we also use river rocks and other decorative rocks, perhaps with some fire glass, to give our home and garden a natural look as they can be used instead of pavers or concrete. We can also find river rocks used as a riprap or soil covering to avoid erosion and water runoff, or as backfill for french drains. Uniformly colored rocks can function as a decorative addition to an aquarium or can even be landscaped together with your mulch and neatly mowed lawn. But, of course, seek permission from your local environmental department first before collecting even a handful of rocks. In specific locations, we may find many of the same rock types that we can collect and use at home. They also come in a variety of colors depending on the minerals present in them. These rocks are usually round in shape and have smooth textures due to the friction from the water's continuous flow. River rocks is the name for gravel and rocks found in the streambeds of natural water channels, like rivers or creeks.
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