| Andanan River | |
| Discharge1 Location: | Wawa River |
| Discharge1 Avg: | 42m3/s |
| Source1 Location: | Sibagat, Agusan del Sur, Caraga Region |
| Mouth: | Wawa River |
| Mouth Location: | Maygatasan, Bayugan |
| Mouth Coordinates: | 8.8509°N 125.814°W |
| Progression: | Andanan–Wawa–Agusan |
| Basin Size: | 12km2 |
| Pushpin Map: | Mindanao |
| Pushpin Map Caption: | Wawa River mouth |
| Length: | 38km (24miles) |
| Subdivision Type1: | Country |
| Subdivision Name1: | Philippines |
| Subdivision Type2: | Region |
| Subdivision Name2: | Caraga |
| Subdivision Type3: | Province |
| Subdivision Name3: | Agusan del Sur |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Sibagat, Bayugan |
The Andanan River (Tagalog: Ilog Andanan; Cebuano: Suba sa Andanan) is a stream located in Sibagat, Agusan del Sur and Bayugan, Caraga Region,[1] Philippines. It is a tributary of the larger Wawa River.
The Andanan River is situated approximately 8.85089, 125.814 in the island of Mindanao.[2]
The Andanan River headwaters from the Diwata Mountain Range of Sibagat, Agusan del Sur. It traverses along Barangay New Tubigon in Sibagat and the riverbank barangays of Bayugan namely: San Juan, Berseba, Santo Niño, Calaitan, Santa Irene and Noli where its mouth located in Barangay Maygatasan joins with the larger Wawa River. The Wawa River is one of the larger and longer rivers in the province of Agusan del Sur and a tributary river to the Agusan River.[3]
There are two permanent bridges that cross the Andanan River:
The Andanan River and its surrounding areas was declared as a nature reserve called the Andanan Watershed Forest Reserve (AWFR) proclaimed by virtue of Philippine Presidential Proclamation No. 734 dated May 29, 1991 with an area of 15,097 hectares comprises with eight (8) barangays namely; Sta. Irene, Calaitan, Berseba, Sto. Niño, Mt. Carmel, Mt. Ararat, San Juan all of Bayugan and Barangay New Tubigon in Sibagat, Agusan del Sur.[4] [5]
The areas of the Andanan River is being proposed as Andanan Natural Park under the National Integrated Protected Areas System (NIPAS). This protected area has its own biological features of fauna and flora dipterocarp and premium species. Ecotourism sites like caves, waterfalls, lakes and unique rock formations are the mere features for tourist destination.
The area covered by the proclamation is under the administrative jurisdiction, supervision and control of the Philippines Department of Environment and Natural Resources through its Forest management Bureau in coordination with other government agencies with objective of maintaining its usefulness as a source of water for domestic, agriculture, power generation and other forestry purposes.
the Andanan River Watershed supports potable drinking water and irrigation for Bayugan, Sibagat, and other areas of Agusan del Sur.[6]