For the optimization of the drinking water network in Mombasa, Kenya we delivered a scada project to improve the water supply for water company MOWASCO together with Vitens Evides International (VEI). The scada project makes the drinking water network in Mombasa transparent and better manageable.
For VEI Bas Swildens and Arrie Karreman travelled to Mombasa, installed the equipment and educated the employees on site. The mission of VEI is to help the least developed countries in the world with sustainable improvements in the water distribution.
To improve the water supply, the scada project takes care of monitoring and controlling functions in the water distribution network. The solution exist of webscada Stream and a wireless D26 battery data logger. The data logger collects data from the drinking water network and the webscada Stream presents all relevant data and takes care of the alarms and follow-up actions.
In the future equipment can be placed in various District Metered Areas (DMAs). Because of the easy installation it can be done using the same equipment, according to Bas Swildens. In this way MOWASCO gains insight in the whole water network step by step, in a low cost way.
The first step is to log the data from the water meters that are already available in the distribution network. “We connect the water meters to data loggers”, explains Swildens. “Then the data is send real-time to webscada Stream. In the second phase; the water meters are connected to the distribution network at DMA level, so that leakage losses are calculated.”
The battery-operated D26 logger can also work on a solar panel, so monitoring can take place on different places without a main power connection.
To realize sustainable projects VEI works with local parties. This way the project continues after VEI has completed her part of the mission. Datawatt previously worked with VEI on the delivery of the WOP WASA project in Bangladesh for optimizing the drinking water structure in the poor areas of Dhaka, Bangladesh. This project has already been handed over to local parties.
The scada project is part of an overall plan to improve the water supply in Mombasa. The source of the drinking water in Mombasa is the Kilimanjaro mountain. Due to climatic variations, deforestation, irrigation and local industry, less and less water from the mountain reaches the city. Besides the increase of the population provides a larger demand for drinking water supply. The drinking water shortage in Mombasa is largely the result of long and vulnerable supply lines and the lack of storage capacity close to the city.
Optimization water distribution network
Logging data in the drinking water network gives a lot of information. With this information leaks and taps can be traced in the distribution network. The water company determines which measurements are necessary to achieve a lower NRW (Non Revenue Water) with the information that is supplied from the scada system. NRW is the amount of water that has been purchased but that does not reach the end user. The lack of a solid infrastructure and process optimization causes often a high NRW in many third world countries.