1. U.S.
Geological Survey, Missouri Water Science Center, 1400 Independence
Road, Rolla, Missouri 65401, United States
2. Department
of Civil, Environmental, and Architectural Engineering, Missouri University of Science and Technology, 1201 North State Street, Rolla, Missouri 65409, United States
3. Department
of Mathematics and Statistics, Missouri University of Science and Technology, 1201 North State Street, Rolla, Missouri 65409, United States
4. Department
of Plant and Soil Science, University of Delaware, 531 South College
Avenue, Newark, Delaware 19716, United States