SURFACE WATER POLLUTION ASSESSMENT AND PROPOSED SUSTAINABLE TECHNOLOGY INNOVATION FOR RIVER RESTORATION IN THE KLAWING WATERSHED, PURBALINGGA REGENCY, INDONESIA. icontrees [Internet]. 2026 Jun. 30 [cited 2026 Aug. 13];. Available from: https://proceedings.uinsaizu.ac.id/index.php/icon-tress/article/view/1634