FreshWaterWatch 2016 field report tracking ’s waters

Ir Hendri Sosiawan We are very grateful for your care, let’s keep on training citizen scientists, collecting water samples Dear Citizen Science Leaders, and continue our efforts to disseminate knowledge We really appreciate your enthusiasm and about the importance of caring for water. Together commitment. we can secure a significant step in sustaining water availability and quality. You have put your Citizen Science Leader training in the classroom and in the field to practice by Ir Hendri Sosiawan collecting many water samples along the Agroclimate and Hydrology Research Institute River. REPORT FIELD You all are the ambassadors who care about the environment, especially the river ecosystem. This ecosystem is particularly vulnerable to pollution. You are all environmental researchers. Your commitment, passion and concern for the quality of the river water is admirable, thank you! Amazon Riverboat Exploration—2012

1 HIGHLIGHTS The highest concentration of nitrate and phosphate in the Ciliwung River is found during the dry season (July-October) and when the agricultural practices for vegetable crops is very intensive.

We have found that the fluctuations of nitrate and phosphate concentrations in Ciliwung river are not only influenced by agriculture practices, but also depend on rainwater discharge during the rainy season or dry season. In a tropical country like the water river discharge is significantly different between the rainy and dry seasons. So the abundance of nitrate and phosphate in the water during the rainy season was diluted by increased rainwater discharging into the river, even though the agricultural practices along Ciliwung river were at their peak.

We are implementing FreshWater Watch as a part of integrated water resources management for the Kali Pusur and Kapilaler irrigated area in Klaten Regency, Central . We are also planning a collaboration with Indonesian government on a project in the Ciliwung-Cisadane River Basin.

We are sharing information and knowledge to a group of farmers located on the upstream of Ciliwung river. We taught them how to apply proper fertiliser dosages for their agricultural practices. Reducing fertiliser use can have positive impacts on the nutrient concentrations in the water, and also reduce the likelihood for eutrophication. - FIELD RE

ACKNOWLEDGEMENTS We sincerely give our thanks to our beloved colleague, Dr. Elleonora Runtunuwu who devoted her time, energy, mind and totally dedicated her knowledge and effort to conducting and supporting this Amazon Riverboat Exploration—2012 programme. May her soul rest in peace. 2 GLOBAL OUTCOMES Dear FreshWater Watchers, Thanks to your great contributions, we have reached 13,000 water quality datasets collected from more than 2,000 waterbodies across the globe. As this research gathers momentum I strongly encourage you to continue your efforts and refresh your skills on the FreshWater Watch website if you need a reminder. Your data are opening up new insights on freshwater ecosystems. You are helping researchers, water agencies, and planners better identify healthy waterbodies to be conserved and the degree of degradation that requires mitigation. Thanks to your measurements, Earthwatch and our partners are identifying drivers Prof. Steven Loiselle, to degradation of these fundamental environments. By using commonly agreed on University of Sienna thresholds for eutrophication — 1mg of nitrates per litre and 0.1mg phosphate per Research Manager, litre — your measurements show that, on average, 36% of the nitrate measurements exceed the threshold, and 27% exceed the phosphate threshold. Global Freshwater Research, These same measurements also hint that there is an important correlation between elevated phosphate concentrations and the increased occurrence of algal blooms. Earthwatch This builds a 2015 study that was published based on data from 13 FreshWater Watch cities. More and more people are joining FreshWater Watch and using the results of your measurements; the programme is being used as an example of private, public and NGO organisations working together to improve the environment on which we all depend. Thank you all and make sure you stay in touch and keep testing!

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