Very nice method, thank you. Setting the multimeter to the impedance/resistance setting, detects resistance from dry (infinity) to some reading. If set to "volt" it won't really help much, so look for the Ω setting. In some cases, it might be deeper than 50m though, and longer conductor might be needed. Ensure the exposed ends of the wire cannot touch each other, or the steel casing of the borehole, or you will get erroneous readings :) It would be awesome if frequent, and scattered borehole owners can do water tests (like at BEMLabs etc), and form a map of coliform/quality/nutrient content across the city areas. It would help people to udnerstand that underground water is a finite resource, that degrades with excessive extraction.
Excellent - well presented. How do we create incentives to encourage groundwater users to engage in the citizen science project. We want to know more about how water abstraction and how the recharge affects the retention and flow the aquifer. Assuming there is some quality control in the data, citizen science can play an important role in helping this initiative to grow further.
Thank you for your positive feedback, Kevin. Indeed, we are exploring incentives for participation as part of extending the reach of groundwater level monitoring in residential and business areas. Data quality control is always a hurdle to scale in such initiatives. Would love to know of study examples you might have to build on?
Due to the cost of buying a data logger (about R10k upwards), they tend to be used for measuring large-scale abstraction where we need to monitor collective groundwater use. This is why this is part of this WWF funded project where we have placed them at various places across Cape Town to ascertain and monitor the level of Cape Town’s groundwater use. From this we can map trends over time. Before a data logger can be fitted, an observation pipe needs to be in place. If you are interested in buying a data logger, there are suppliers in Stellenbosch (Van Walt) and Gauteng (Geowater) and GEOSS is able to assist with installation. If you require more info, kindly send us your email address so we can send you a schematic diagram supplied by GEOSS.
Wow!!! Nice to see you Kia. Last saw you on the Expresso show. Keep up the good work.
With the hot dry summer here in the UK I just followed your video to test the water level in our borehole. Very helpful, thank you so much.
We're so glad it was useful. 😊
Very nice method, thank you. Setting the multimeter to the impedance/resistance setting, detects resistance from dry (infinity) to some reading. If set to "volt" it won't really help much, so look for the Ω setting. In some cases, it might be deeper than 50m though, and longer conductor might be needed. Ensure the exposed ends of the wire cannot touch each other, or the steel casing of the borehole, or you will get erroneous readings :)
It would be awesome if frequent, and scattered borehole owners can do water tests (like at BEMLabs etc), and form a map of coliform/quality/nutrient content across the city areas. It would help people to udnerstand that underground water is a finite resource, that degrades with excessive extraction.
Excellent - well presented. How do we create incentives to encourage groundwater users to engage in the citizen science project. We want to know more about how water abstraction and how the recharge affects the retention and flow the aquifer. Assuming there is some quality control in the data, citizen science can play an important role in helping this initiative to grow further.
Thank you for your positive feedback, Kevin. Indeed, we are exploring incentives for participation as part of extending the reach of groundwater level monitoring in residential and business areas. Data quality control is always a hurdle to scale in such initiatives. Would love to know of study examples you might have to build on?
Where do we get a water level data logger?
Due to the cost of buying a data logger (about R10k upwards), they tend to be used for measuring large-scale abstraction where we need to monitor collective groundwater use. This is why this is part of this WWF funded project where we have placed them at various places across Cape Town to ascertain and monitor the level of Cape Town’s groundwater use. From this we can map trends over time. Before a data logger can be fitted, an observation pipe needs to be in place. If you are interested in buying a data logger, there are suppliers in Stellenbosch (Van Walt) and Gauteng (Geowater) and GEOSS is able to assist with installation. If you require more info, kindly send us your email address so we can send you a schematic diagram supplied by GEOSS.