Ephemeral streams have cut deeply incised arroyos into alluvial and eolian sediments in many of the watersheds within the Yakima Training Center (YTC) military reservation, south-central Washington. The most recent channel incision episode along Selah Creek is primarily attributed to multiple failures of an irrigation reservoir dam during the winters of 1909 and 1910. The modern arroyo exposed evidence of at least one previous episode of arroyo incision to a depth of ~4 m that occurred just prior to 1530- 1340 cal yr BP. Filling of this paleo-arroyo with fine to coarse grained sand ceased between 650-103 cal yr BP. Changes in paleoclimatic conditions resulting in an increased sediment supply and/or flood magnitude and frequency could have contributed to the initiation of incision of paleo-arroyo(s) within the Selah Creek basin. Almost no overlap of the timing of arroyo incision exists between the northwestern and southwestern U.S. which allows for the possibility of negative correlation between regions.
","abstract_html":"<p>Ephemeral streams have cut deeply incised arroyos into alluvial and eolian sediments in many of the watersheds within the Yakima Training Center (YTC) military reservation, south-central Washington. The most recent channel incision episode along Selah Creek is primarily attributed to multiple failures of an irrigation reservoir dam during the winters of 1909 and 1910. The modern arroyo exposed evidence of at least one previous episode of arroyo incision to a depth of ~4 m that occurred just prior to 1530- 1340 cal yr BP. Filling of this paleo-arroyo with fine to coarse grained sand ceased between 650-103 cal yr BP. Changes in paleoclimatic conditions resulting in an increased sediment supply and/or flood magnitude and frequency could have contributed to the initiation of incision of paleo-arroyo(s) within the Selah Creek basin. Almost no overlap of the timing of arroyo incision exists between the northwestern and southwestern U.S. which allows for the possibility of negative correlation between regions.</p>","abstract_has_math":false,"creators":["Durkee, Matthew Ian"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":null,"degree_discipline":"Geological Sciences","degree_department":null,"school":null,"contributors":["Lisa Ely","Marie Ferland","Beth Pratt-Sitaula"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-01-01T08:00:00Z","date_published":"2012-01-01T08:00:00Z","updated_at":"2026-07-24T01:37:54Z","subjects":["Arroya","Central Washington","Washington State","Yakima Training Center","Stratigraphy","Geology","Geomorphology","Hydrology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.cwu.edu/etd/1449","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lisa Ely","Marie Ferland","Beth Pratt-Sitaula"]},{"key":"dc:creator","label":"Author","values":["Durkee, Matthew Ian"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2020-12-17T08:00:00Z"]},{"key":"dc:type","label":"Dc Type","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geological Sciences"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Arroya","Central Washington","Washington State","Yakima Training Center","Stratigraphy","Geology","Geomorphology","Hydrology"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://digitalcommons.cwu.edu/etd/1449"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Ephemeral streams have cut deeply incised arroyos into alluvial and eolian sediments in many of the watersheds within the Yakima Training Center (YTC) military reservation, south-central Washington. The most recent channel incision episode along Selah Creek is primarily attributed to multiple failures of an irrigation reservoir dam during the winters of 1909 and 1910. The modern arroyo exposed evidence of at least one previous episode of arroyo incision to a depth of ~4 m that occurred just prior to 1530- 1340 cal yr BP. Filling of this paleo-arroyo with fine to coarse grained sand ceased between 650-103 cal yr BP. Changes in paleoclimatic conditions resulting in an increased sediment supply and/or flood magnitude and frequency could have contributed to the initiation of incision of paleo-arroyo(s) within the Selah Creek basin. Almost no overlap of the timing of arroyo incision exists between the northwestern and southwestern U.S. which allows for the possibility of negative correlation between regions.
"]},{"key":"dc:title","label":"Title","values":["Holocene Arroyo Cut and Fills Cycles, South-Central Washington"]}]}],"canonical_facts":{"dc:contributor":["Lisa Ely","Marie Ferland","Beth Pratt-Sitaula"],"dc:creator":["Durkee, Matthew Ian"],"dc:date.available":["2020-12-17T08:00:00Z"],"dc:description.abstract":["Ephemeral streams have cut deeply incised arroyos into alluvial and eolian sediments in many of the watersheds within the Yakima Training Center (YTC) military reservation, south-central Washington. The most recent channel incision episode along Selah Creek is primarily attributed to multiple failures of an irrigation reservoir dam during the winters of 1909 and 1910. The modern arroyo exposed evidence of at least one previous episode of arroyo incision to a depth of ~4 m that occurred just prior to 1530- 1340 cal yr BP. Filling of this paleo-arroyo with fine to coarse grained sand ceased between 650-103 cal yr BP. Changes in paleoclimatic conditions resulting in an increased sediment supply and/or flood magnitude and frequency could have contributed to the initiation of incision of paleo-arroyo(s) within the Selah Creek basin. Almost no overlap of the timing of arroyo incision exists between the northwestern and southwestern U.S. which allows for the possibility of negative correlation between regions.
"],"dc:identifier":["https://digitalcommons.cwu.edu/etd/1449"],"dc:subject":["Arroya","Central Washington","Washington State","Yakima Training Center","Stratigraphy","Geology","Geomorphology","Hydrology"],"dc:title":["Holocene Arroyo Cut and Fills Cycles, South-Central Washington"],"dc:type":["Text"],"thesis:degree_discipline":["Geological Sciences"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T01:37:54Z"}