700,000 Acre-Feet of Water. One Aquifer. Can We Help It Recharge? (Full Documentary)

The Edwards Aquifer is the primary water supply for more than 2 million people across South Central Texas. It feeds Comal and San Marcos Springs, sustains endangered species found nowhere else on earth, and is currently enduring the second-longest drought on record. Most people who live above it couldn't tell you how it works. This is the full documentary, all three episodes of our series with the Edwards Aquifer Authority filmed on-site at their Field Research Park outside San Antonio, plus two bonus scenes not included in the original release. Episode one covers the ground-up explainer: what the Edwards Aquifer is, the three zones and how water moves through them, what karst geology means for water quality and vulnerability, how the EAA manages the system through critical period drought restrictions, and what it would actually take for the aquifer to fail. Episode two goes into the science. The EAA has instrumented a berm and swale treatment area with pressure transducers, soil sensors, electrical resistivity tomography, and nuclear magnetic resonance tools to build a long-term data set on whether these land management practices actually improve aquifer recharge. The early data is promising. Whether it becomes proof is a question that may take decades to answer. Episode three walks the Scar Project, a degraded stream channel where the EAA team has installed brush mats, one rock dams, media lunas, rock rundowns, and Zuni bowls using on-site materials, two people, and a chainsaw. A year and a half in, bare limestone is becoming living soil. This is some of the most important work we've put out. We hope it changes how you think about the land beneath your feet. Learn more at https://www.edwardsaquifer.org/ 🌱 Want to design your land or home to work with your watershed? Learn more about our work: https://www.symbiosistx.com/ Support the channel on Patreon or Youtube Membership:   / symbiosistx   Follow us on Instagram: @symbiosistx 0:00 — Introduction 1:05 — Meet the Edwards Aquifer Authority 1:45 — EPISODE ONE: What Is the Edwards Aquifer? 2:21 — The Three Zones Explained 3:34 — What the Aquifer Looks Like Underground 4:22 — Who Depends on It? 5:45 — Scale and Recharge: 700,000 Acre-Feet Per Year 6:15 — How the EAA Manages the System 6:59 — Karst Geology Explained 8:33 — Why Contamination Is a Serious Concern 11:34 — Water Quality and Riparian Vegetation 13:29 — Do Juniper Roots Help Water Infiltrate? 15:13 — What Does the Aquifer Look Like Underground? 16:40 — A Drop of Rain: One Year or One Hundred Years 18:28 — Standing in a Recharging Stream 19:02 — Incised Waterways and Healthy Floodplains 21:36 — What Is the EAA and How Does It Work? 22:19 — The Permitting System: 1,200 Permits, 2 Million People 23:39 — How Drought Triggers Cutbacks 25:05 — The Current Drought: 90 Years of Data 27:25 — What Would It Take for the Aquifer to Fail? 29:48 — Species Refugia and the Worst-Case Scenario 30:39 — EPISODE TWO: Berms and Swales on a Recharge Zone 32:04 — About the Field Research Park 32:54 — How Berms and Swales Work 35:20 — Measuring Subsurface Moisture and Infiltration 37:30 — Defining Drought from a Groundwater Perspective 40:03 — Land Stewardship in a Wet Year 41:18 — Pressure Transducers and Soil Sensors 43:10 — Soil Water Potential Explained 44:55 — Soil Organic Matter and Water Holding Capacity 46:02 — Infiltration vs. Recharge 50:07 — Electrical Resistivity Tomography: What the Data Shows 51:33 — Nuclear Magnetic Resonance and Combined Data Sets 54:17 — Organic Matter, Evapotranspiration, and the Water Cycle 56:27 — Stormwater Mitigation and the Scar Project 57:55 — Building Structures That Last Generations 59:12 — EPISODE THREE: The Scar Project 1:00:05 — What Is the Scar Project? 1:00:53 — Instrumentation and Water Quality Sampling 1:02:07 — Brush Mats: How They Work 1:05:10 — Slowing vs. Damming 1:06:39 — Bare Rock Becomes Living Soil 1:09:22 — One Rock Dams: Construction and Early Results 1:10:55 — What Is an Incised Stream? 1:12:40 — Bill Zeedyk and Dr. Molly Walton 1:15:53 — Media Lunas: Sheet Flow Spreaders 1:18:09 — Rock Rundowns: Treating Erosive Channels 1:19:56 — Boom and Bust Landscapes 1:21:20 — Brush Mats Revisited and Sediment Measurement 1:24:20 — Aesthetics vs. Ecology 1:25:50 — Brush Media Lunas and Redundancy 1:28:17 — Zuni Bowls: Treating Headcuts 1:30:32 — Comparing the Full Spectrum of Structures 1:32:00 — Soil Temperature and Microbiome Refugia 1:34:02 — Reflections: What We Learned 1:35:50 — Closing Remarks from the EAA Team 1:37:35 — Outro