Hawaii Rivers Shown on the Map: Kalopa Gultch, Kaula Gultch, Olokele River, Wailua River and Wailuku River.
Hawaii Lakes Shown on the Map:
Hawaii Stream and River Levels
The United States Geological Survey has a number of stream gages located throughout Hawaii. These estimate stream levels, discharges and record them over time. This data is published on the web and many stations allow users to plot custom graphs. Get updated Hawaii river and stream levels from USGS here.
Hawaii Stream and River Level Alerts
The United States Geological Survey has a system that will send you an email message when flood levels are reached on any steam with USGS gaging equipment that you have selected. Sign up here to recieve Hawaii stream and river level alerts.
Hawaii Water Publications
The United States Geological Survey has a number of publications related to water use and water resources in Hawaii. View the water resource publications for Hawaii here.
Cinnabar - the only important ore of mercury. Used as a pigment until its toxicity was realized.
Hawaii Drought Map
The United States Geological Survey publishes updated drought maps on their website. There you can view a map that shows where below normal 7-day average stream flow conditions were recently recorded. The maps are updated daily. Get a current Hawaii drought map here.