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<p>water impoundment, diversion, or raising the water level. Mostly built on watercourses with steep gradients, they serve other purposes such as <a href="page.php?w=water_oxygenation">water oxygenation</a> and <a href="page.php?w=erosion">erosion</a> prevention.</p>

<p><big>Typical designs</big></p>
<p><a href="page.php?w=Image%3AGroutedSlopingBoulderDrop.JPG">thumb</a>Drop structures can be classified into three different basic types: vertical hard basin, grouted sloping boulder, and baffle chute. Each type is built depending on water flow, steepness</p><p>
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