PPT-Soil Water Potential Measurement

Doug Cobos PhD Decagon Devices and Washington State University Two Variables are Needed to Describe the State of Water Water content and Quantity Extent Related Measures. Doug Cobos Ph.D.. Decagon Devices. . and Washington State University. Background. About the presenter. Ph.D. in Soil Physics, 2003, University of Minnesota. Director of Research and Development, Decagon Devices, Inc.. Douglas R. Cobos, Ph.D.. Decagon Devices and Washington State University. Background. About the presenter. Ph.D. in Soil Physics, 2003, University of Minnesota. Director of Research and Development, Decagon Devices, Inc.. Topics. Soils. Soil water properties. Soil water balance. Reading: Applied Hydrology Sections 4.3 and 4.4 . (Green-. Ampt. method). Soil Map of the United States. Developed from SSURGO – Soil Survey Geographic Database. (. WA) Maps and Reports from Web Soil Survey. http://websoilsurvey.nrcs.usda.gov/app/. Contact:. Brad Duncan. Assistant State Soil Scientist. Spokane NRCS State Office. Brad.Duncan@wa.usda.gov. 509-323-2982. Dr. Greg Butters. Soil Physics. Department of Soil and Crop Sciences. A lecture for SOCR 571- Foundations of Soil Science. Soil water in a complex, multiple process domain. Outline. Fundamental relationships. LECTURE OBJECTIVES. Understand the . runoff generation processes. Know measures that can be used to regulate . runoff . rate. LECTURE OBJECTIVES. Know the applications of . runoff data in . hydrology, water management and agriculture. Doug . Cobos, Ph.D.. Decagon Devices and Washington State University. Two Variables are Needed to Describe the State of Water. Water content. and. Quantity . Extent . . . Related Measures. Decagon Devices and Washington State University. Plants fundamental dilemma . Biochemistry requires a highly hydrated environment (> -3 . MPa. ). Atmospheric environment provides CO. 2. and light but is dry (-100 . Thomas B. Williams, Jr.. New England CP, Inc.. tom@newenglandcpinc.com. Acknowledgement. Much of this PowerPoint was created by Kevin Garrity who taught this class for many years.. Introduction. The pipe-to-soil potential measurement is the most important measurement we make.. (. WA) Maps and Reports from Web Soil Survey. http://websoilsurvey.nrcs.usda.gov/app/. Contact:. Brad Duncan. Assistant State Soil Scientist. Spokane NRCS State Office. Brad.Duncan@wa.usda.gov. 509-323-2982. . Jesse Libra. CE 394K. Flying J . Junction . Site. Issues with the site:. In the Floodway/Floodplain. Drains towards the North Llano River via a . TxDOT. drainage ditch.. *Southeastern Hill Country: Mason, Llano, . Soil water retention curve. The relationship between soil matric potential and soil water content. “matric suction” = - soil matric potential. Usually soil volumetric water content is used. Usually determined based on empirical data. . Jesse Libra. CE 394K. Flying J . Junction . Site. Issues with the site:. In the Floodway/Floodplain. Drains towards the North Llano River via a . TxDOT. drainage ditch.. *Southeastern Hill Country: Mason, Llano, . Dr. Habibur Rahman. Associate Professor. J. N. College, Boko. Water Absorption: Organ, Mechanism: . Absorption of water and nutrient is carried by the younger portions of a root, near its tip. The very tip is covered with a sheathing root cap which protects the delicate underlying tissues as the root pushes its way through the soil..