Water run-off weirs

Ki mua

Whai muri

A first step in drawing up soil conservation guidelines was to measure water run-off and sediment content in different management systems. Today there is also emphasis on measuring the phosphorus and nitrogen content of the runoff water. This is a site for measuring run-off flow from a farmed catchment. The height of the water flowing through the V notch weir is automatically recorded by equipment in the small hut. Samples are also periodically taken for measurement of water quality. Measurements of surface run-off can also be made using small run-off plots.

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Private collection

by Allan Gillingham

This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.

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Comments

Joe Ellsworth
05 November 2016

I love the picture on your water-run-off-weirs. I was wondering if you have a similar picture that shows a series of Weirs used to slow the flow of water down a similar gully. I would like to add them to a blog article I am working on. We are working on a project to help identify every location where a weir could be installed in deforested regions where the reservoir could capture between 250 and 3500 gallons of water. The software uses NASA elevation data to determine where every raindrop will most likely drain. We use this to figure out based on a average storm for that area where to place weirs that will capture the target amount of water. We are focusing on small reservoirs that can be build by hand using mostly rock and sand so they can be deployed in areas with high poverty. Thanks Joe Ellsworth. 206-601-2985 https://airsolarwater.com/reduce-soil-errosion-lost-rivers-from-deforestation/

Panonihia te reo

Kōrero: Soil erosion and conservation