Luquillo biocomplexity meeting january 2004
This presentation is the property of its rightful owner.
Sponsored Links
1 / 32

Luquillo Biocomplexity Meeting January 2004 PowerPoint PPT Presentation


  • 73 Views
  • Uploaded on
  • Presentation posted in: General

Luquillo Biocomplexity Meeting January 2004. Hydrology overview Stream-Hydrology issues Pike/Scatena research plan. Steep Environmental Gradients Subtropical Dry (1200 mm/yr) to Wet (5000mm/yr) Windward vs leeward. Hydrology Overview. Steep Environmental Gradients

Download Presentation

Luquillo Biocomplexity Meeting January 2004

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Luquillo biocomplexity meeting january 2004

Luquillo Biocomplexity Meeting January 2004

  • Hydrology overview

  • Stream-Hydrology issues

  • Pike/Scatena research plan


Luquillo biocomplexity meeting january 2004

  • Steep Environmental Gradients

  • Subtropical Dry (1200 mm/yr) to Wet (5000mm/yr)

  • Windward vs leeward


Hydrology overview

Hydrology Overview

  • Steep Environmental Gradients

  • Maritime climate with high rainfall frequency minor seasonality

    • 3 rain showers/day, High interception,

    • Intense rainfalls; >500 mm/day, 125 mm/day threshold; Hurricanes, TS, northern fronts

  • Dynamic disturbance regime

    • Hurricanes, landslides, tree-falls

    • Old on inside-young on outside


Luquillo biocomplexity meeting january 2004

Seasonality of Luquillo Climate

May

Rains


Luquillo biocomplexity meeting january 2004

Forest Wide Temperature

Based on regression of Temp vs elevation, aspect


Luquillo biocomplexity meeting january 2004

Wet Season

Dry Season


Hydrology overview1

Hydrology Overview

  • Steep Environmental Gradients

  • Maritime climate with high rainfall frequency minor seasonality

  • Dynamic disturbance regime

    • Hurricanes, landslides, tree-falls

    • “Old on inside-young on outside”


Hillslope processes

Hillslope processes

  • Deep Clayey soils; 6 + m of saprolite

    • Volcanoclastics vs Grandiorite

  • Hillslope Catena’s

  • Shallow flow paths; < 1 m

    • through-flow vs overland flow

    • soil compaction, trail erosion

  • Landslides; 1000-2000 yr turnover

    • roads, elevation, bedrock

    • Larsen, Zarin, Walker


Luquillo biocomplexity meeting january 2004

Bisley Hillslope profile

Soil and saprolite 10-20 m thick

Storage; at 1% water content = 100-200 mm; 1 month throughfall


Luquillo biocomplexity meeting january 2004

Clay and saprolite subsoil with relatively low ksat = low recharge


Luquillo biocomplexity meeting january 2004

Storm hydrographs

H20

Na, Mg

Ca, CL


Stream channel hydrology

Stream Channel Hydrology

  • Headwaters

    • Steep gradient, boulders, structural control

    • Supply limited

    • “clean water”

  • Coastal plain

    • Alluvial and channelized

    • Relatively stable planform morphology

    • Aggradation/degradation cycle


Luquillo biocomplexity meeting january 2004

Annual 7 day

Minimum

Q90

Q50

Xiphocaris spp. Night

Atya spp. Night


Luquillo biocomplexity meeting january 2004

Daily Discharge Series

No Extraction

Extraction = Q95, No Minimum In-stream Flow

Extraction = Q95, Minimum In-stream Flow = Q99


General hydrologic land use issues

General Hydrologic/land use issues

  • Municipal water withdrawal

    • aquatic migrations

  • Urbanization

  • Reservoir sedimentation

    • USGS, landslides

  • Coastal Plain deforestation

    • RAMS model


Luquillo biocomplexity meeting january 2004

Regional-scale changes

Synoptic

Systems

Tradewinds

Energy &

Moisture

Land-Sea

Tectonic

Uplift

Sea

Level


On going research efforts

On-going research efforts

  • GIS based-statistical models

    • Garcia; low flow prediction, Rivera; peak discharges, Santos; island wide water chemistry

  • Simulation models

    • Hall SUNY-ESF; Soil carbon, ET

  • Interception and cloud forest hydrology

    • Free University of Amsterdam

  • Stream water chemistry, N cycling

    • W. McDowell, UNH

  • Instream flows and water withdrawals

    • Pringle UGA


Luquillo biocomplexity meeting january 2004

Roads

Communication

Facilities

Water

Intakes

Roads &

Maintenance

Buildings


Stream road issues hydrologic issues

Stream/road issuesHydrologic issues

  • Freeze-thaw

  • Groundwater discharge

  • Flooding

    • overbank, diversion flooding

  • Erosion of unpaved roads

  • Damage to bridges and culverts

  • Landslides


  • Stream road chemical issues

    Stream/Road-Chemical issues

    • Applied chemicals (e.g. road salt..)

      • minor herbicide use

    • Road material

      • asphalt, dirt

    • Emissions

      • Odum Co2

      • Chemical spills

    • Swimming


    Social considerations

    Social considerations

    • Social significance of Luquillo Streams

    • Seasonality of recreation

      • locals vs snowbirds

      • don’t go to beach in months with “R”

    • Short travel distances and short storms

    • Shystostomisis and “dirty” streams

    • Swimming skills


    Luquillo biocomplexity meeting january 2004

    Current Biocomplexity Efforts


    Channel morphology aquatic habitat

    Channel morphology-aquatic habitat

    • GIS-Statistical based approach

      • Develop null then evaluate road crossings

    • Work Plan

      • Aug 2003; channel cross-sections

      • Fall 03; GIS layers

      • Jan 2004; pebble counts

      • Spring 04; develop manuscript I

      • Summer 04; Espirtu Santo, bridges

      • 2005; bridge habitat analysis, water falls…


    Luquillo biocomplexity meeting january 2004

    Slope Raster


    Luquillo biocomplexity meeting january 2004

    Channel slope vs Drainage area

    Sonodora= 2.6 km2

    Puente Roto = 17.8 km2

    Mameyes at RT3 = 34.7 km2


    Luquillo biocomplexity meeting january 2004

    Drainage Area vs Channel Width


    Luquillo biocomplexity meeting january 2004

    Slope

    Mean grain size/Basin area


  • Login