Effects of persistent drought on Lake Mead and
- Slides: 16
Effects of persistent drought on Lake Mead and the Las Vegas Valley Shari Schwartzer
Agenda • • • Background Drought Information Stream Delineation Bathymetry Calculations Future Work
Lake Mead • • Largest reservoir in US Formed by Hoover Dam Supplies water to NV, AZ, CA Currently at 37% capacity
Third Straw • $817 M • 6 years • Uncapped September 2015
Water Use
Drought in Las Vegas Valley
Stream Delineation
Stream Delineation
Stream Delineation
Bathymetry
Bathymetry – Boulder Basin
Lake Mead Depth YEAR 2011 2012 2013 2014 2015 2016
Lake Mead Level Calculations Surface Area Volume Max depth Watershed Area Mean Inflow Hydraulic Residence Time Watershed Area to Lake Surface Area Ratio 2009 Given 637. 05 3583. 4 162 433, 000 13. 4 2. 6 680 Calculated Units 611. 828 m 2 2690. 0 m 3 144. 27 m 427944 km 2 km 3/yr years 699 % Dif -4% -25% -11% -1% 3%
Future Work – Compare bathymetry from different years • Utilize 3 D Analyst tools • Calculate mean, max depths, volume changes – Factors for volume changes i. e. evaporation, population growth – Calculate volume-area-elevation function
References • Clark County (US Census – Population data) – http: //www. clarkcountynv. gov/gis/services/Pages/Free. GISData. aspx • USGS – Stream flow, water level, river reach – http: //nevada. usgs. gov/lmqw/ • Bureau of Reclamation -Lake levels form the lower Colorado river operations – http: //www. usbr. gov/lc/riverops. html • NOAA – precipitation data – http: //www. cpc. ncep. noaa. gov/products/GIS_DATA/USDM_Products/precip/index. php • North American Land Data Assimilation System (NLDAS) monitor -precipitation, runoff, evaporation, and snow melt) – http: //www. emc. ncep. noaa. gov/mmb/nldas/ • Southern Nevada Water Authority (SNWA)
Thank you QUESTIONS?
- Lake powell and lake mead
- Lake powell and lake mead
- Persistent vs non persistent http
- Lake mead facts
- Lake mead max depth
- Drought and desertification
- Lentic lake
- Drought in a sentence
- Hong kong drought
- Bibliography of drought in south africa
- Aleph toolbox
- Drought presentation
- Anasazi drought
- Mrsac maharashtra gov in jalyukt
- Vermont drought monitor
- Utah drought map
- Drought stopper system