The aim of the communication materials is to publicise the COALA Project among potential users. This Delive...
This Deliverable is an update of the first version of the Communication and Dissemination Plan.
This Deliverable describes the pilot experiments of COALA Project. Participatory evaluation of the COALA se...
The plenary meeting of COALA Project has been held on 23rd, 24th and 30 November 2020
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Round Table meetings, July 7-8-13, 2020
Remote sensing-based tools help effectively control illegal water uses. Irrigation non-compliance is becoming a more and more serious issue with increased droughts and changing climate. With these techniques, you can locate irrigated areas without concession and excesses of the authorised volume.
Because of its scarcity, irrigation water use in La Mancha Oriental (Spain) is regulated by strict rules:
Irrigation non-compliance mainly occurs:
There are a small number of users who do not respect the rules but can cause distrust in the system and general uncontrollability in water use. As the saying goes; One rotten apple can spoil the whole bunch. Aircraft and drones cannot currently economically locating these violations, because there are thousands of wells in the vast expanse of land in La Mancha Oriental (9,962 km2).
The ERMOT and the DIANA projects have provided water managers with robust, remote sensing-based tools to locate potential defaulters.
The geographic information system shared between water users and the Júcar Hydrographic Confederation provides the layer of those areas that have irrigation authorisation. Remote sensing indicates surfaces that are compatible with irrigation water use. The crossing of both layers locates the points where the field inspection has to be directed. The inspector checks for illegal irrigation and proceeds to sanction.
Remote sensing allows farmers to obtain information about the quantity, quality and development of vegetation in a plot. You can express these factors in a vegetation index (NDVI) that is directly related to water consumption.
For each farm, water consumption can be estimated and compared with the volume authorized for watering. If the farmer exceeds this volume, the inspector checks the crops and water meters in the field and proceeds to sanction.
The effectiveness of the control system has allowed the number of non-compliance with the rules to be low. The volume of illegal irrigation water used represents less than 1% of all uses in La Mancha Oriental.
Control of non-compliance with the rules for the use of irrigation water is essential to avoid overexploitation of water bodies. In the case of La Mancha Oriental (Spain), the ERMOT and DIANA projects have provided water managers with tools to locate defaulters. The information provided by earth observation is inexpensive and highly effective in controlling water uses.