PPT-RUNOFF

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. G.S. Karlovits, J.C. Adam, Washington State University. 2010 AGU Fall Meeting, San Francisco, CA. Outline. Climate change and uncertainty in the Pacific Northwest. Data, model and methods. Climate data. Reading: Applied Hydrology Sections 5.6 to 5.8 and Chapter 6 for Thursday. Surface water. Watershed – area of land draining into a stream at a given location. Streamflow – gravity movement of water in channels. 7.1 Components of a natural hydrograph. The various contributing components of a natural hydrograph are shown in figure 7.1. To begin with there is baseflow only; that is, the groundwater con­tribution from the aquifers bordering the river, which go on discharging more and more slowly with time. The hydrograph of baseflow is near to an exponen­tial curve and the quantity at any time is represented very nearly by:. Reading: Applied Hydrology Sections 5.6 to 5.8 and Chapter 6 for Tuesday of next week. Runoff. Streamflow. Generation. Excess Rainfall and Direct Runoff. SCS Method for runoff amount. Examples from Brushy Creek. Dane Hurst. GIS in Water Resources. Utah State University. Fall 2014. Project Objective. Develop . a model . to forecast total seasonal snowmelt runoff for two major reservoirs downstream of the Abajo Mountain range in San Juan County, UT. Soil Water. Precipitation and Evaporation. Infiltration, Streamflow, and Groundwater. Hydrologic Statistics and Hydraulics. Erosion and Sedimentation. Soils for Environmental Quality and Waste Disposal . Dave Morgan, Paul Johnston and Laurence Gill. Trinity College Dublin. Phil Collins. HRD Technologies Ltd. Kwabena Osei . Hydro International. morgandt@tcd.ie. Department of Civil, Structural & Environmental Engineering. Professor Ke-Sheng Cheng. Dept. of Bioenvironmental Systems Engineering. National Taiwan University. Runoff generating process. Rainfall losses during a storm event. Interception. Depression storage. Flavio Lehner. , Andrew W. Wood, Julie A. . Vano. , David M. Lawrence, . Martyn. P. Clark, Justin S. . Mankin. : . Nature Climate Change, 9, 926–933 (2019) doi:10.1038/s41558-019-0639-x. APPROACH. Quantifies . reductions in . phosphorus (P) and TSS runoff for . a given BMP or group of . BMPs. Can be used to determine best BMP(s) for a particular situation. Why do we need to know these?. Meet regulatory requirements. Fly ash, a by product resulting from the combustion of pulverized coal.. 70% of thermal power stations wastes end up in landfills (Hasset et al., 200). Potential toxic effects of heavy metals released to the environment as:. Runoff. Streamflow. Generation. Excess Rainfall and Direct Runoff. SCS Method for runoff amount. Examples from Brushy Creek. Reading for today: Applied Hydrology sections 5.1 to 5.6. Reading for Tuesday Feb 19: Applied Hydrology Sections 5.7 and 5.8, Chapter 6. WJEC Focus Box 3.1.4. Eduqas Focus Box 2.1.4 . We . are grateful to Hodder for their permission to use the diagrams . in . this . resource.. Water Cycle . 4. A. ir uplift, condensation, clouds. A. ir . From Mays, 2011, Ground and Surface Water Hydrology. A D hour unit hydrograph is the characteristic response of a given watershed to a unit volume (e.g. 1 in or cm) of effective water input (usually rain) applied at a constant rate for D hours.