Rivers and Beaches (ESS/Ocean 230)!Dave Montgomery Chuck Nittrouer 341 Johnson Hall / 685-2560 111 Marine Sciences Building / 543-5099 [email protected] [email protected] Isaac Larsen 362 Johnson Hall [email protected] Professor, Dept of Earth & Space Sciences Ph.D., University of California, Berkeley Dave Montgomery studies the evolution of topography and the influence of geomorphological processes on ecological systems and human societies. His work includes studies of the evolution and near-extirpation of salmon, fluvial and hillslope processes in mountain drainage basins, the evolution of mountain ranges (Cascades, Andes, and Himalaya), and the analysis of digital topography of Earth and Mars.Marine Geology and Geophysics Professor, School of Oceanography and Dept of Earth & Space Sciences Ph.D., University of Washington Chuck's research interests include the modern and ancient formation of sedimentary strata in continental-margin environments, and the effects of physical and biological oceanic processes on sedimentary characteristics. Ongoing research includes coastal areas of New Guinea-Australia, the Mediterranean, and US west coast. Other recent studies have been completed at the mouths of the Amazon River, Asian rivers, and off Antarctic and Alaskan glaciers.Topics to be covered Earth Surface Processes Mountains ⇒ Rivers ⇒ Beaches ⇒ Ocean Holistic view, including: 1) Solid Earth 2) Atmosphere Linkages of all these will be an emphasis of the course.In order for there to be mountains, rocks must be uplifted above sea level. !If uplift continued unopposed there would be no limit to how high mountain ranges can get.Erosion counter-balances rock uplift!Mountain streams receive material from hillslopes and transport it to riversRivers transport material to the coast!Nearshore processes redistribute sediment along beaches and coastlines!Types of beaches reflect differences in sediment sources and transport!Earth Surface = where we live Recent Dramatic examples: Centralia rainfall ⇒ landslides ⇒ flooding New Orleans/Galveston hurricane ⇒ wind ⇒storm surge Indonesia earthquake ⇒ submarine landslide ⇒ tsunami emphasis on understanding fundamental processes, but shock and awe will come with some examplesRivers and beaches are part of sediment transfer systems. • What forms them? • What are the processes that maintain them? • Why are there different types of rivers and beaches? • What controls their distribution across Earth’s surface?We’ll use 1 equation in this class I - O = ΔS Input minus output equals change in storage. # # ##Also known as conservation of mass #(Δ means change in something)Time and Place! Lectures: M,W & F 1:30 - 2:20 75 Johnson Hall Labs (5 credit): W 2:30 - 3:20 111 Johnson Hall Lab Fee: $50 3 or 5 credits (Natural World) Website: http://gis.ess.washington.edu/grg/courses09_10/ess230/index.htmlExams and Grading!9 Nov (M) Mid-Term Exam, during class 14 Dec (M) Final Exam 2:30 – 4:20 (PM) Grading: 3 credits 5 credits!midterm = 40% 35% field trip/labs = 20% 30% final = 40% 35% No make-up field trips, No extra creditField Trips A1 10 Oct (Sat) Nisqually River watershed A2 17 Oct (Sat) Nisqually River watershed B 21 Oct (Wed) Puget Sound cruise C 21-22 Nov (Sat & Sun) Olympic Peninsula Beaches For 3 credits; fieldtrip A is required. You are welcome to participate in additional field trips, if space is available. For 5 credits; all field trips required. Email Andy to reserve your space on trip A [email protected]/Field Trip Write Ups! A field trip write up is due after each field trip, as indicated on the course syllabus.Field Trip A!Trip from Mt. Rainier downstream to Nisqually River delta Either Saturday October 10 or Saturday October 17 All day!Start at glaciated flank of Mt. RainierMt. Rainier Nisqually River DeltaField Trip A!Follow river system down through mountain streams and into large riversField Trip A!End at delta system where Nisqually River empties into Puget SoundField Trip A!Field Trip B!!Working cruise on Puget Sound with Research Vessel Thompson, UW’s oceanographic research vessel Wednesday 21 October All day (no class or lab)!Cruise on Puget Sound in Elliot Bay Sample bottom sediments, measure water salinity and temperature, and map bathymetrydepth in m Duwamish delta 4-m resolution, 5x VENisqually Delta, 5x VE 3-m resolution, looking SW depth in metersField Trip C!!Beaches of the Olympic Peninsula 21-22 November Saturday and Sunday; Overnight camping in the field on Saturday night.Bring clothes for bad weather (rain, cold, wind) -- even if it doesn’t seem like you’ll need them! Get UW supplemental field trip insurance: it’s only $0.85 per day! (www.washington.edu/admin/risk/documents/ Domestic_Trip_Coverage.pdf) Field Trip Tips!You must email Isaac by this Friday with your preferred date for field trip A. [email protected] Space will be filled on a first-come basis If you are 3-credit and would like to go on more than one trip -- clearly indicate this. Constraints: limited space for 3-credit people on Thompson cruise (field trip B). Field Trip Commitments!Field Trips A1 10 Oct (Sat) Nisqually River watershed A2 17 Oct (Sat) Nisqually River watershed B 21 Oct (Wed) Puget Sound cruise C 21-22 Nov (Sat & Sun) Olympic Peninsula Beaches For 3 credits; fieldtrip A is required. You are welcome to participate in additional field trips, if space is available. For 5 credits; all field trips required. Email Isaac to reserve your space on trip A [email protected] to Sink A different way of seeing landscapes…!The Big Picture = The Rock Cycle!Material eroded from mountains enters streams and rivers and is delivered to coastal environments, from where it is moved to deeper sedimentary basins that get shoved back into mountains through processes of rock uplift.!The Rock Cycle!The Rock Cycle!Erosion in the Rock Cycle!What we see as rivers and beaches are rest stops for sediment moving through the eroding half of the rock cycle.!Framework for this Class Rock uplift Mountains Mountains Mountain Streams Mountain Streams Rivers Rivers Estuaries Estuaries Beaches Beaches Off-shore depositional basins Off-shore depositional basins
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