The rapid implementation of large scale floating solar panels has consequences to water quality and local ecosystems. Environmental impacts depend on the dimensions, design and proportions of the system in relation to the size of the surface water, as well as the characteristics of the water system (currents, tidal effects) and climatic conditions. There is often no time (and budget) for thorough research into these effects on ecology and water quality. A few studies have addressed the potential impacts of floating solar panels, but often rely on models without validation with in situ data. In this work, water quality sensors continuously monitored key water quality parameters at two different locations: (i) underneath a floating solar park; (ii) at a reference location positioned in open water. An underwater drone was used to obtain vertical profiles of water quality and to collect underwater images. The results showed little differences in the measured key water quality parameters below the solar panels. The temperature at the upper layers of water was lower under the solar panels, and there were less detected temperature fluctuations. A biofouling layer on the floating structure was visible in the underwater images a few months after the construction of the park
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Inland surface water systems are characterized by constant variations in time and space. The increased pressure, of natural or anthropic origin, as a consequence of climate change, population growth and urban development accentuate these changes. Effective water management is key to achieve European waterquality and ecological goals. This is only possible with accurate and extensive knowledge of water systems.The collection of data using platforms such as underwater, water surface or aerial drones is gradually becoming more common and appraised. However, these are not yet standard practice in watermanagement. This work addresses the receptivity of water managers in the Netherlands towards underwater drone technology:· Listing and testing of suitable applications;· Comparison between data requirements of water managers (e.g. legislation) and data thatunderwater drones can provide;· Identification of features should R&D projects focus to increase the interest of the water sector.
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In eerste instantie wordt bij de term ‘drone’ vaak gedacht aan onbemande,op afstand bestuurbare, vliegtuigjes. Minder bekend is dat er ook dronesbestaan die onder water inzetbaar zijn. Deze ‘submerged drones’ kunnenworden gebruikt voor aquatisch ecologisch onderzoek.
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Urban delta areas require innovative and adaptive urban developments to face problems related with land scarcity and impacts of climate change and flooding. Floating structures offer the flexibility and multi-functionality required to efficiently face these challenges and demands. The impact of these structures on the environment, however, is currently unknown and research on this topic is often disregarded. This knowledge gap creates a difficulty for water authorities and municipalities to create a policy framework, and to regulate and facilitate the development of new projects.Monitoring the effects of floating structures on water quality and ecology has been difficult until now because of the poor accessibility of the water body underneath the structures. In this work, a remote controlled underwater drone equipped with water quality sensors and a video camera was used to monitor dissolved oxygen near and under floating structures. The collected data showed that most water quality parameters remain at acceptable levels, indicating that the current small scale floating structures do not have a significant influence on water quality. The underwater footage revealed the existence of a dynamic and diverse aquatic habitat in the vicinity of these structures, showing that floating structures can have a positive effect on the aquatic environment. Future floating structures projects therefore should be encouraged to proceed.
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With climate change and urban development, water systems are changing faster than ever. Currently, the ecological status of water systems is still judged based on single point measurements, without taking into account the spatial and temporal variability of water quality and ecology. There is a need for better and more dynamic monitoring methods and technologies. Aquatic drones are becoming accessible and intuitive tools that may have an important role in water management. This paper describes the outcomes, field experiences and feedback gathered from the use of underwater drones equipped with sensors and video cameras in various pilot applications in The Netherlands, in collaboration with local water managers. It was observed that, in many situations, the use of underwater drones allows one to obtain information that would be costly and even impossible to obtain with other methods and provides a unique combination of three-dimensional data and underwater footage/images. From data collected with drones, it was possible to map different areas with contrasting vegetation, to establish connections between fauna/flora species and local water quality conditions, or to observe variations of water quality parameters with water depth. This study identifies opportunities for the application of this technology, discusses their limitations and obstacles, and proposes recommendation guidelines for new technical designs
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Fresh water systems are rapidly changing and water quality is deteriorating as a result of climate change. Aquatic drones can help us understand these changes - which will be key to tackling water-related challenges ahead.The ideas presented in this article aim to inspire adaptation action – they are the views of the author and do not necessarily reflect those of the Global Center on Adaptation.
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Deze maand doken Nederlandse onderwater drones op in de Indonesische nationale pers. Onder grote belangstelling las men dat een consortium van Indonesische en Nederlandse organisaties (Tauw, INDYMO, TU Delft en water & milieulab WLN Indonesia) start met een grootschalig internationaal onderzoek naar oplossingen voor de slechte kwaliteit van oppervlaktewater in dichtbevolkte gebieden, zoals Surabaya. Hierbij werden innovatieve meetmethoden ingezet, waaronder aquatische drones. De eerste resultaten wijzen uit welke vervuilende bronnen aangepakt moeten worden: industrieel en huishoudelijk afvalwater). Tijdens de interactie bij de innovatieve metingen groeide de betrokkenheid van de partijen en werd duidelijk welke stakeholders betrokken moeten worden bij het opstellen - en uitvoeren - van nieuwe regelgeving, alsook het creëren van maatschappelijke bewustwording over het belang van een duurzame gezonde leefomgeving. Hierbij zullen de belangrijkste lessen die Nederland in de laatste decennia geleerd heeft worden toegepast, ook Nederland kent een geschiedenis van zuurstofloze rivieren en grachten vol vuilnis. De ‘lessons learnt’ omtrent bewustwording, regelgeving en innovatieve meettechnieken zijn van groot belang bij internationale kennisuitwisseling van de Nederlandse topsector water, een van de belangrijkste exportproducten van Nederland.
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Large floating projects have the potential to overcome the challenge of land scarcity in urban areas and offer opportunities for energy and food production, or even for creating sustainable living environments. However, they influence the physical, chemical, biological and ecological characteristics of water bodies. The interaction of the floating platforms affect multiple complex aquatic processes, and the potential (negative/positive) effects are not yet fully understood. Managing entities currently struggle with lack of data and knowledge that can support adequate legislation to regulate future projects.In the Netherlands the development of small scale floating projects is already present for some years (e.g. floating houses, restaurants, houseboats), and more recently several large scale floating photovoltaic plants (FPV) have been realized. Several floating constructions in the Netherlands were considered as case-studies for a data-collection campaign.To obtain data and images from underneath floating buildings, underwater drones were equipped with cameras and sensors. The drones were used in multiple locations to scan for differences in concentrations of basic water quality parameters (e.g. dissolved oxygen, electrical conductivity, algae, light intensity) from underneath/near the floating structures, which were then compared with data from locations far from the influence of the buildings. Continuous data was also collected over several days using multi-parameter water quality sensors permanently installed under floating structures.
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There is an urgency for developing methods that are capable of monitoring watersystems that are fast changing due to climate change and increase of anthropogenic pressure. Updated and real-time detailed data is necessary to support water and soil management strategies. This study evaluates the implementations of novel techniques in different socio-economic settings. Sensors and cameras were installed in mobile platforms (including boats and underwater drones), and deployed to assess spatial data variability. Environmental scans were performed at multiple locations with different water systems in The Netherlands, Indonesia and Denmark. Results from themultiple methods (sensor, cameras) provided new insights into spatial variation of water quality, contrasting with traditional point sampling. Feedback from waterauthorities and other stakeholders indicate that collected data can be used tosupport management actions, and that such increasingly accessible technologiescontribute to creating awareness to water related issues.
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Urban delta areas are facing problems related with land scarcity and are impacted by climate change and flooding. To meet the current demands and future challenges, innovative and adaptive urban developments are necessary [de Graaf, 2009]. Floating urban development is a promising solutions, as it offers the flexibility and multifunctionality required to efficiently face the current challenges for delta cities. It provides flood proof buildings and opportunities for sustainable food and energy production
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