PPT-RUNOFF LECTURE 10 1 RUNOFF

Runoff may be defined as that part of precipitation as well as any other flow contributions which appear in surface streams of either perennial or seasonal nature It is the flow collected from a drainage basin appearing at the outlet of the basin or catchment. 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. Science questions raised in the development of a science . assessment. Effect . of Conservation Tillage Systems on Dissolved . Phosphorus . Gregory McIsaac. University of Illinois. &. Agricultural Watershed Institute. Jon . Luevano. Urbanization. Growth and development of cities. Large population density. Highly industrialized. Comparing city to city. Size (area). Population density. Percentage of urban coverage. Hydrological impacts . Basic . Concepts. Lamar Smith. Cascabel Ranch and Consulting. Carta Valley, Texas. OBJECTIVES. Understand water balance. Understand basic erosion processes on rangeland. Understand how brush control affects water yield and . Revising the urban stream syndrome for the . arid Southwest US. Stream hydrology controls stream health. Poff. et al. (1997) “The natural flow regime” . Bioscience. . 47. : 769-784. Natural ground cover. EROSION. Detachment – particle/aggregate loosened from surface. Entrainment – initiation of motion by flow. TRANSPORT. Rill – concentrated overland flow. Inter-rill (. sheetwash. ) – diffuse overland flow. 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: . Haested. Section 2.4 Computing Hydrographs. Excess . Rainfall and Direct Runoff . Rainfall that is neither retained on the land surface nor infiltrated into the soil. Graph of excess rainfall versus time is called excess rainfall hyetograph. Learning objectives. Be able to use stationary linear response methods (unit hydrograph) to calculate catchment response. Be able to estimate the unit hydrograph from data . Be able to describe the assumptions, limitations and uses of linear response methods . 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. 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. 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:. Usman Mohseni1, Sai Bargav Muskula2. 1,2Research Scholar, Department of Civil Engineering, IIT Roorkee, Roorkee, INDIA. INTRODUCTION. Rainfall-runoff modelling is one of the most prominent hydrological models used to examine the relation between rainfall and runoff . 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 .