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Report Calls For "Radical Changes" To Colorado River Management

3:55
Talk to me the situation today in the Colorado River Basin with drought and climate change.
In the year 2000 Lake Powell was essentially full or nearly full. At about the year 2000 we went into a protracted period of reduced runoff that persists to this day…. If you’re going to keep your use of water high and you’ve got less water is coming in, guess what, the reservoirs begin to you withdraw water out of the reservoirs. That’s why we have reservoirs. So everything was working the way it was supposed to, except that the drought kept going on. At some point it was like, whoa, we got problems here…. And so we keep cutting agreements, which are: how to share the pain of drought? We have an agreement the Law of the River is what it is but you can’t make water up, so if there isn’t enough water to go around you’ve got to deal with it… This new white paper that we produced is essentially an exploration of: what if it stays this dry? What if it gets drier? ....

Jack Schmidt , Melissa Sevigny , Credit Us Bureau Of Reclamation , Colorado River Studies At Utah State University , Colorado River , Colorado River Studies , Utah State , Colorado River Basin , Flaming Gorge , Upper Basin , Lower Basin , Colorado River Compact , Local News , Science And Innovation , பலா ஶ்மிட் , மெலிசா செவிக்ி , கடன் எங்களுக்கு பணியகம் ஆஃப் மீட்பு , கொலராடோ நதி ஆய்வுகள் இல் உட்டா நிலை பல்கலைக்கழகம் , கொலராடோ நதி , கொலராடோ நதி ஆய்வுகள் , உட்டா நிலை , கொலராடோ நதி பேசின் , எரியும் கார்ஜ் , மேல் பேசின் , கீழ் பேசின் , கொலராடோ நதி சிறிய ,

Earth Notes: Pozzolan And Dam Construction

2:02
Pozzolans are a class of silica- and aluminum-rich materials commonly derived from explosive volcanic deposits. The early Romans knew of their value, incorporating them into aqueducts and buildings. The word
pozzolan comes from a town in Italy.
Added to Portland cement, pozzolan reacts with hydrated lime. It’s beneficial because it replaces some of the cement that’s needed in the concrete end product. And it creates a more durable, long-lasting concrete that’s less permeable to water a desirable quality in materials used for dams, bridges, and canal linings.
From the late 1950s into the early 1960s, pozzolan was mined in the volcanic field near Flagstaff and used as a key additive to the concrete for Glen Canyon Dam. When that source played out, Sugarloaf Mountain on the San Francisco Peaks was also tapped. ....

Glen Canyon , United States , Sugarloaf Mountain , San Francisco , Glen Canyon Dam , Credit Us Bureau Of Reclamation , San Francisco Peaks , க்ளென் பள்ளத்தாக்கு , ஒன்றுபட்டது மாநிலங்களில் , சர்க்கரை ரொட்டி மலை , சான் பிரான்சிஸ்கோ , க்ளென் பள்ளத்தாக்கு அணை , கடன் எங்களுக்கு பணியகம் ஆஃப் மீட்பு , சான் பிரான்சிஸ்கோ சிகரங்கள் ,