Comal County Conservation Alliance (CCCA)
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Runoff Inflow Volumes to the Highland Lakes in Central Texas: Temporal Trends in Volumes and Relations between Volumes and Selected Climatic Indices

4/4/2020

 
April 3, 2020 
​
Article, Article Vol 11, Vol 11 (2020), Vol 11 (2020)

​
Inflow to the Highland Lakes has substantially decreased from 1942–2013, likely due to increased evapotranspiration from the proliferation of 19 major upstream reservoirs and about 69,500 minor reservoirs and water bodies. Increased evapotranspiration from land surfaces and stream channels also probably represent major causes for inflow reduction. Eight climatic indices were evaluated with respect to correlations with inflow volumes to the lakes. A combination of the indices for the Atlantic Multidecadal Oscillation and Oceanic Niño Index (Niño 3.4 region) was found to be, up to three months in advance, a fair indicator for the wettest three-month inflow periods, and a good indicator, up to nine months in advance, of the driest three-month inflow periods. The single best index indicator of dry periods is the Pacific Decadal Oscillation—a good indicator of the driest three-month periods up to a year in advance.
© 2020 Raymond M. Slade, Jr.
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​Comal County Conservation Alliance
PO Box 2804
Canyon Lake, TX 78133

​​Contact us: 
info@comalconservation.org


CCCA is a 501(c)(3) nonprofit.

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At CCCA, we believe that the work to preserve nature and maintain the healthy natural systems in our county is an effort that is benefitted by the representation and participation of all segments of our community, embracing the rich diversity of talent, perspectives, experiences, and needs found throughout our county. Diversity includes people of different ages, races and ethnicities, abilities and disabilities, genders, religions, cultures, and sexual orientations. ​All are welcome and encouraged to participate in the effort to preserve land, water, and wildlife in ​Comal County. 
  • HOME
    • About Us >
      • Who We Are
      • Why We Care
    • Career Opps
    • What's Up
    • Board and Staff
    • Committees
    • Advisory Board
    • Conservation Insider Newsletter
    • CCCA in the News
    • Partners
    • Our Future
    • Comment
  • Events
    • Upcoming Events
    • Past Events 2023
    • Events 2022
  • Conservation
    • Climate Change >
      • Natural Climate Solutions
      • Texas Climate
      • Nature-based Solutions
    • Comal Land Conservation Fund
    • Conservation Easements
    • Conservation's Future
    • For Kids
    • Hill Country Issues
    • Published Columns
    • References
  • Land
    • Bullis Consortium
    • Caves & Karst
    • Farm & Ranchland
    • Great Springs Project
    • Green Growth
    • Health & Nature
    • Hiking Trails
    • Keep Comal Wild
    • Land Legacy
    • Land Preservation
    • Landowner Tools
    • Native Plants & Habitats
    • Next Generation
    • Open Space
    • Saving Rural Heritage
    • Trees
    • Under Our Land
  • Water
    • Aquifer Conservation
    • Aquifers & Springs
    • Comal Springs
    • Four Fountains
    • One Water
    • Precious Water
    • Water & Drought
    • Water Preservation
    • Water Security
  • Wildlife
    • Bird Migration
    • Birds
    • Hunting & Fishing
    • Monarch Migration
    • Night Skies 1
    • Night Skies 2
    • Wildlife Preservation
  • Take Action
    • Volunteer
    • Contact Your Rep
    • Letters to the Editor >
      • Published Letters to the Editor
    • Social Media
    • Subscribe
    • Support Our Supporters
  • Donate