| 词条 | Agusan River |
| 释义 |
| name = Agusan River | name_native = | name_native_lang = | name_other = Rio Grande de Agusan | name_etymology = | image = File:Agusan river.jpg | image_size = 250px | image_caption = The Agusan River viewed from Magsaysay Bridge in Butuan City | map = Agusan river watershed.png | map_size = | map_caption = Agusan River drainage basin | pushpin_map = Mindanao#Philippines | pushpin_map_size = | pushpin_map_caption= Agusan River mouth | subdivision_type1 = Country | subdivision_name1 = Philippines | subdivision_type2 = Region | subdivision_name2 = {{hlist|Caraga|Davao Region}} | subdivision_type3 = Province | subdivision_name3 = Agusan del Sur | subdivision_type4 = Cities/municipalities | subdivision_name4 = {{hlist|Butuan City|Bayugan City}} | subdivision_type5 = | subdivision_name5 = | length = {{convert|390|km|mi|abbr=on}}[1] | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = | source1 = Mount Tagubud, Pantukan, Compostela Valley | source1_location = Davao Del Norte | source1_coordinates= | source1_elevation = {{convert|1022|m|abbr=on}} | mouth = Butuan Bay | mouth_location = Butuan City | mouth_coordinates = {{coord|8|57|0|N|125|31|58|E|display=inline,title}} | mouth_elevation = {{convert|0|m|abbr=on}} | progression = | river_system = | basin_size = {{convert|11937|km2|abbr=on}}[2] | tributaries_left = {{hlist|Umayam River|Bansa River|Ojot River|Manat River|Bugabos River}} | tributaries_right = {{hlist|Wawa River|Andanan River|Gibong River|Choco River in Compostela|Ulip River}} | custom_label = | custom_data = | extra = }} Agusan River is a river in the Philippines, located in the north-eastern part of Mindanao island, draining majority of the Caraga region and some parts of Compostela Valley province. It is the country's third largest river basin (after Cagayan River and Rio Grande de Mindanao) with a total drainage area of {{Convert|11937|km2}}[2] and an estimated length of {{Convert|390|km}} from its origin.[1][3][4] The headwaters of the river are found in the mountains of Compostela Valley, near its border with Davao Oriental and east of Tagum City. It flows through the wide Agusan River valley which measures {{convert|177|km|mi|sp=us}} from south to north and varies from 32–48 kilometers (20–30 miles) in width.[5] It finally drains into the Butuan Bay at its mouth in Butuan City. One of the prominent features in the Agusan River basin is the presence of the Agusan Marsh covering a total area of {{convert|19197|ha}}. The marsh serves a flood retention basin for the Agusan River, cutting the high discharge of water causing flash floods in the lower reaches of the river. Aside from that, the marsh harbors unique and pristine habitats like the sago and peat swamps forest and is a home to endangered and endemic flora and fauna. As a consequence, it was designated a wildlife sanctuary by then-President Fidel V. Ramos in 1996.[4] GeographyWatershedThe Agusan River basin is divided into three sub-basins on the basis of topographic features: the upper Agusan River basin, the middle Agusan River basin, and the lower Agusan River basin. The upper Agusan River basin is the section from its headwaters in the mountains of Compostela Valley province to Santa Josefa, Agusan del Sur to Veruela, Agusan del Sur, the middle Agusan River basin is the section of the river from Santa Josefa to Amparo, Agusan del Sur while the lower Agusan River basin is from Amparo to its mouth at Butuan City, Agusan del Norte. See also
References1. ^1 {{cite web |title=Agusan River - River, Philippines |url=https://www.britannica.com/place/Agusan-River |website=www.britannica.com |publisher=Encyclopedia Britannica |accessdate=10 April 2017 |language=en |date=July 20, 1998}} {{Principal Rivers of the Philippines}}2. ^1 {{cite web |author1=Vicente B. Tuddao Jr. |title=Water Quality Management in the Context of Basin Management: Water Quality, River Basin Management and Governance Dynamics in the Philippines |url=http://www.wepa-db.net/pdf/1203forum/08.pdf |website=www.wepa-db.net |publisher=Department of Environment and Natural Resources |accessdate=10 April 2017 |date=September 21, 2011}} 3. ^{{cite web |url=http://www.eoearth.org/article/Water_profile_of_Philippines#River_Basins_and_Water_Resources |title=Water profile of Philippines |last=Kundel |first=Jim|date=June 7, 2007|publisher=Encyclopedia of Earth|accessdate=2008-09-30| archiveurl= https://web.archive.org/web/20080921155605/http://www.eoearth.org/article/Water_profile_of_Philippines| archivedate= 21 September 2008 | deadurl= no}} 4. ^1 {{cite web|title=Technical Assistance To The Republic of the Philippines For A Master Plan For the Agusan River Basin |publisher=Asian Development Bank |date=December 2004 |url=http://www.adb.org/Documents/TARs/PHI/tar-phi-36540.pdf |format=PDF |accessdate=2008-08-09 |deadurl=yes |archiveurl=https://web.archive.org/web/20070713184424/http://adb.org/Documents/TARs/PHI/tar-phi-36540.pdf |archivedate=2007-07-13 }} 5. ^Plains of Mindanao 5 : Rivers of the Philippines|Landforms of Agusan del Norte|Landforms of Agusan del Sur|Landforms of Compostela Valley|Butuan |
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