>Remote Sampling Strategy
Home » Research » Projects » Volcanic Lakes » Keli Mutu » Remote Sampling Strategy

Remote Sampling Strategy

In light of the riskiness of a climbing descent a remote strategy was used to collect lake samples. A 3-D perspective schematic of the remote sampling system is shown below. The system features a 402-m-long 14 gauge fencing wire spanning a crater and serving as the primary support for the sampling line. This support cable was carefully strung over TAP during the afternoon of August 16 and later over TiN on August 21. Numerous small bushes lining the TAP crater rim hindered the process, while the deep notches surrounding the TiN crater slowed the transplanting of the cable from the first lake to the second. Onto the support cable a series of two pulleys was attached.


VL_remotesampling.gif

The upper pulley rolled smoothly along the support and ferried the sampling line out over the lake by the force of gravity acting on the weight of the sampling bottle assemblage. To retrieve the pulley a 305m 80lb. test nylon-coated stainless steel wire bound to it was reeled in using a model 113 Penn Senator(R) reel. The lower pulley was connected to the upper pulley by a locking carabiner which allowed for a 90 deg offset and some free rotation. The sampling line itself was a 305m 210lb. test stainless steel braided wire spooled onto a modified trawling downrigger. This line was fed through the lower pulley and connected beyond it to the instruments.

According to elementary physics the tension resulting from the weight (w) of the sampling bottle assemblage, sampling line, and support cable on the support cable is divided into three vectors. Ignoring the third dimensional force (going into the page in the schematic), the tension on the cable resolves into Ta and Tc, where

  • Ta = f(w,sin x)
  • Tc = f(w, sin z)

    Given a weight of 50lbs. and an angle x = z = 30 deg, the total tension on the support cable equals Ta + Tc = 200lbs. In practice, applying more weight actually increases the angle so if 60lbs. were used and the angle was therefore increased to 37 deg then the total tension would still equal 200lbs. The delicate balance of weight and angle combined with some incalculable parameters including the angles x and z (which also change as the pulley moves out over the lake) and the support cable's tensile strength made any exact theoretical design impossible to implement. Nevertheless the underlying tensile warnings were heeded and the system worked as described for several days.
>Remote Sampling Strategy
  • Home
  • About Me
  • Research
    • Scientific Highlights
    • Projects
      • Near-Census River Science
        • 2DMUs
        • Hydraulic Topography
        • Topographic Change Detection
        • Topographic Change Processes
        • Floodplain Inundation
        • Streamwood Storage
        • Upper South Yuba
        • Salmonid Migration
        • North Yuba River
        • Salmon Migratory Habitat
      • Geomorphic Covariance Structures
      • Synthetic River Valleys
      • Watershed Processes
        • Watershed Sediment Transport
        • Watershed Streamwood
        • Watershed Sedimentation
      • River Rehabilitation
        • Spawning Habitat Rehabilitation
        • Cobble/Gravel Injection
        • Streamwood Jams
        • Geomorphologist's Guide
      • Waterfalls
        • Horseshoe Falls
        • NSEAM 1.0
        • Hydraulic Jumps
        • Small Step Mapping
        • Small Step Hydraulics
      • Tidal Freshwater Deltas
        • TFD Introduction
        • TFD Vegetation
        • TFD Sediment Cycles
        • TFD Ecogeomorphology
        • TFD Hydrometeorology
        • TFD Sediment Transport
        • TFD Modeling
        • TFD Animal Response
        • Bush River, MD
        • Winter's Run, MD
      • Estuarine Processes
        • Salinas River Estuary
        • San Joaquin-Sacramento Delta
        • Blackwater National Wildlife Refuge
        • Long Island Sound
      • Functional Flows Model
      • Volcanic Lakes
        • VL Classification & Modeling
        • VL Bibliography
        • Keli Mutu
          • Remote Sampling Strategy
        • Lake Batur
        • Other Volcanic Lakes
      • Agricultural Sediment
      • Urban Rivers
      • Chaos in Hydrology
      • Channel Types
    • Methods
      • Net Sedimentation Tile (NST) Protocol
      • Sediment Core Processing Protocol
      • Vibracoring Protocol
      • Loss-On-Ignition Protocol
      • C-14 Sample Selection and Prep Protocol
      • Cation Sample Prep and Analysis Protocol
      • Grain Size Distirbution Protocol
      • MS Word Fig. code
      • Kite Blimp Method
      • Laser Granulometer Protocol
    • Software
      • River Builder
    • Sponsors
  • Teaching
    • SAS 004Y : Water in Popular Culture
      • Course Logistics
      • Sections
      • Syllabus
        • SAS004 Introduction
        • Water Scarcity
        • Water Scarcity Discussion
        • Floods
        • Flood Insurance Discussion
        • Water Quality
        • Water Quality Discussion
        • Water & Psychology
        • Water Psychology Discussion
        • Conquering Nature
        • Conquering Nature Discussion
        • Pro Poor Water
        • Pro Poor Water Discussion
        • Arctic Socio-Ecology
        • Indigenous Knowledge
        • Earth Stewardship
        • Earth Stewardship Discussion
        • Global Climate Change
        • Global Climate Change Discussion
        • Coastal Zone in Crisis
        • Coastal Zone Crisis Discussion
        • Course Review
      • Readings
      • Instructor
      • Classroom Behavior
      • Grading Policy
      • Movie Logs
      • Discussion Activities
      • Expository Essay
      • Study Guide
      • Online TA Help
    • ESM 125: River Conservation
      • Syllabus
        • River Conservation Introduction
        • Navigability For Title - Law
        • River Segmentation
        • Historical Hydrology
        • Indigenous River Conservation
        • Habitat Conservation Law
        • Aquatic Habitat
        • Riparian Habitat
        • Water Temperature
        • Sediment Sampling
        • Water Quality
        • CA State Water Boards
        • Biological Opinions
        • Setting Biological Goals
        • County-Level Water Management
        • River Restoration
        • Fish Passage & Fishways
        • Beaver-Assisted Restoration
        • Water Management Lessons
      • Instructor
      • Grading Policy
      • Readings
      • Exams
      • Individual Assignments
      • River Presentations
      • Video Response Canvas Quizzes
      • Reading Response Canvas Quizzes
    • HYD 143 : Ecohydrology
      • Instructor
      • Grading Policy
      • Syllabus
        • Chapter 1
        • Chapter 2
        • Chapter 3
        • Chapter 4
        • Chapter 5
        • Group Activity 1
        • Group Presentations 1
        • Chapter 6
        • Chapter 7
        • Chapter 8
        • Chapter 9
        • Group Activity 2
        • Group Presentations 2
        • Chapter 10
        • Chapter 11
        • Chapter 12
        • Chapter 13
        • Chapter 14
        • Chapter 15
        • Group Activity 3
        • Group Presentations 3
        • Chapter 16
        • Chapter 17
        • Chapter 18
        • Chapter 19
        • Chapter 20
        • Chapter 21
      • Online TA Help
      • Video Response Quizzes
      • Group Presentations
      • In-class Assignments
    • HYD 151 : Field Methods in Hydrology
      • Instructor
      • TA Info
      • Grading Policy
      • Syllabus
        • Chapter 21
        • Chapter 1
        • Chapter 2
        • Chapter 3
        • Chapter 4
        • Assignment 1
        • Chapter 5
        • Chapter 6
        • Assignment 2
        • Chapter 7
        • Chapter 8
        • Chapter 9
        • Assignment 3
        • Chapter 10
        • Chapter 12
        • Chapter 11
        • Chapter 13
        • Chapter 14
        • Assignment 4
        • Chapter 15
        • Chapter 16
        • Chapter 16b
        • Chapter 17
        • Field Equipment Showcase
        • Chapter 18
        • Chapter 19
        • Chapter 20
        • Chapter 22
        • Chapter 23
        • Chapter 24
        • Course Review
      • Readings
      • Online TA Help
      • Field Safety
    • HYD 252: Hillslope Geomorphology and Sediment Budgets
      • Instructor
      • Grading Policy
      • Syllabus
        • Week 1
        • Week 2
        • Week 3
        • Week 5
        • Week 6
        • Week 7
        • Week 8
        • Week 9
        • Week 10
        • Week 4
      • Readings
      • Safety
    • HYD 254Y: Ecohydraulics
      • Instructor
      • Grading Policy
      • Syllabus
        • Introduction to Near-Census River Science
        • Introduction to 2D Modeling
        • 2D Modeling Training
        • 2D modeling discussion & synthesis
        • 2D Modeling Terrain Variability
        • 2D Model Validation
        • Fluvial Landform Assessment
        • Ecological Analysis of Structure and Function
        • Hydrogeomorphic Processes
        • Parameterizing Boundary Roughness
        • Frontiers of River Science
      • Readings
      • Online TA Help
      • Lab Tutorials
    • HYD 256: Geomorphology of Estuaries and Deltas
      • Syllabus
        • Week 1
        • Week 2
        • Week 3
        • Week 4
        • Week 5
        • Week 6
        • Week 7
        • Week 8
        • Week 9
        • Week 10
      • Readings
      • Lab
      • Field Safety
      • Online TA Help
      • Grading Policy
    • Virtual River Methods
      • Syllabus
      • Instructor
      • Grading Policy
      • Readings
      • Assignments
      • Game Setup
  • People
    • MS Students
    • PhD Students
    • Postdocs
    • Committee Advisees
    • Technicians
    • Undergrads
    • Visitors
    • Collaborators
    • Furry Friends
  • Info for Applicants
  • Service
    • Past Service
    • Professional Service
  • Outreach
  • Curriculum Vitae

GET IN TOUCH

  • 223 Veihmeyer Hall
    LAWR Dept., UC Davis
    One Shields Avenue
    Davis, CA 95616
  • (530) 302-5658
  • (530) 752-1552
  • gpast@ucdavis.edu
  • Google Scholar
  • Research Gate
  • ORCID: 0000-0002-1977-4175
  • Dr. Gregory B. Pasternack - Watershed Hydrology, Geomorphology, and Ecohydraulics
UC Davis