SWAT – Land Phase of the Hydrologic Cycle

Slides:

Advertisements

Similar presentations

Hydrology Rainfall - Runoff Modeling (I)

Advertisements

Water in a river drainage system

Water Table and Aquifers

Runoff Processes Daene C. McKinney

Hydrologic Abstractions

Infiltration Infiltration is the process by which water penetrates from ground surface into the soil. Infiltration rate is governed by: rainfall rate hydraulic.

The Caveat: Hydrology Complex Site specific Difficult to accurately quantify More questions than answers.

Watershed Hydrology, a Hawaiian Prospective; Groundwater Ali Fares, PhD Evaluation of Natural Resource Management, NREM 600 UHM-CTAHR-NREM.

CE 3372 – Lecture 10. Outline  Hydrology Review  Rational Method  Regression Equations  Hydrographs.

SWAT – Land Phase of the Hydrologic Cycle Kristina Schneider Kristi Shaw.

TR-55 Urban Hydrology for Small Watersheds

WinTR-20 SensitivityMarch WinTR-20 Sensitivity to Input Parameters.

Watershed Assessment and Diagnosis of Condition for August 20, 2007 Joe Magner and Greg Johnson MPCA.

GEO/ENV 315/GEO 514 Hydrogeology Class meets: Time: Mondays: 5:30 pm – 8:30 pm. Location: ESS 183 Office Hours: Wednesdays and Fridays 3:00 – 4:00 pm ESS.

HEC-HMS Runoff Computation.

What is the Water Table? Zone of aeration • pore spaces contain air

AIM: To explain ways in which fresh water is naturally stored as a resource and predict the effects of depletion of an aquifer. Do Now: Where do we get.

Surface Water Hydrology: Infiltration – Green and Ampt Method

Water Resources A river runs through it…. Water: The Universal Solvent One of the most valuable properties of water is its ability to dissolve. This makes.

Lab 13 - Predicting Discharge and Soil Erosion Estimating Runoff Depth using the Curve Number method –Land use or cover type –Hydrologic condition –Soil.

WinTR-20 SensitivityFebruary WinTR-20 Sensitivity to Input Parameters.

Ф Physical change from liquid to gas Ф 600 calories evaporate 1 gram H 2 O Ф Solar Radiation, Air Temperature, Vapor Pressure, Wind all affect rate.

Surface Water Surface runoff - Precipitation or snowmelt which moves across the land surface ultimately channelizing into streams or rivers or discharging.

Hydrograph Analysis. Components of river flow Contributions into a river/stream Overland flow – Flow over land surface due to precipitation (runoff)

Kristina Schneider Kristi Shaw

Pusat Teknologi Pengajaran & Multimedia GEOGRAPHY HYDROLOGY SYSTEM.

6. Drainage basins and runoff mechanisms Drainage basins Drainage basins The vegetation factor The vegetation factor Sources of runoff Sources of runoff.

Load Estimation Using Soil and Water Assessment Tool (SWAT)

Hydrogeology Distribution of Earth’s Water Fresh Water Reservoirs Inputs and outputs for fresh water reservoirs Ogallala Aquifer Water quality and land.

Sanitary Engineering Lecture 4

Radial Flow to an Unconfined Aquifer From Mays, 2011, Ground and Surface Water Hydrology.

Excess Rainfall and Direct Runoff

HYDROLOGY Lecture 10 Unit Hydrograph

Kristina Schneider February 27, 2001

YEAR-END FACULTY EVALUATIONS

Kristina Schneider Kristi Shaw

Water supply Flood prediction and forecasting. Water quality

Lauren Schneider CE394K.2 Surface Water Hydrology Dr. Maidment 4/28/05

EFH-2 Overview Quan D. Quan Hydraulic Engineer USDA – NRCS – WNTSC

GEM 4409 Hydrology Fall 2005 TROY UNIVERSITY.

What issue do you see in the picture below. How might it be solved?

Example Estimate the average drawdown over an area where 25 million m3 of water has been pumped through a number of uniformly distributed wells.

Groundwater All water found underground, frequently in:

Streamflow Processes Watershed – area of land draining into a stream at a given location Streamflow – gravity movement of water in channels Surface and.

Infiltration and Runoff

The Global & Local Storage and Flow of Water

Watersheds and Water Resources: Vol 2: Groundwater

Test 1 Review Chapter 1, Hydrologic cycle and the water balance

Applied Hydrology Infiltration

Hydrograph Computation

Applied Hydrology Infiltration

SCS Dimensionless Unit Hydrograph

SCS Dimensionless Unit Hydrograph

2.3.2a Water Cycle, Surface Water, and Ground Water

2.1 Basic hydrology.

Hydrology CIVL341.

WRE-1 BY MOHD ABDUL AQUIL CIVIL ENGINEERING.

Hydrology CIVL341 Introduction

Match the drainage basin terms to the correct definitions!

Chapter Four RUNOFF When a storm occurs, a portion of rainfall infiltrates into the ground and some portion may evaporate. The rest flows as a thin sheet.

Hydrology Modeling in Alaska: Modeling Overview

HEC-HMS Runoff Computation Modeling Direct Runoff with HEC-HMS Empirical models Empirical models - traditional UH models - traditional UH models - a.

WARM UP: 10/13/14 As a stream curves, or ______________, the water moves faster on the outside of the curve.

Systems and Components – A Process for Developing the Total Water Budget Handbook for Water Budget Development - With or Without Models CWEMF 2019 Annual.

Presentation transcript:

SWAT – Land Phase of the Hydrologic Cycle Kristina Schneider Kristi Shaw

Surface Water Runoff Calculates surface runoff volumes and peak runoff rates using daily rainfall amounts Runoff volume estimated using a modification of the SCS Curve Number Technique. Two options for estimating the peak runoff rate: The modified Rational formula The SCS TR-55 method

Surface Runoff Volume Selected modified SCS method for the follow reasons: Reliable and has been used for many years in the US Computationally efficient Required generally available inputs Relates runoff to soil type, land use, and management practices R is rainfall & Q is daily runoff The modification deals with how Soil Water content is calculated.

Peak Runoff Rate Rational Method: A stochastic element is included to allow for a realistic runoff rate. tc can be estimated by adding the surface and channel flow times. Alpha is a dimensionless parameter that expresses the proportion of total rainfall that occurs during tc. Q is a daily runoff. A is the drainage Area.

Peak Runoff Rate The SCS TR-55 method The peak runoff rate is dependent on the rainfall distribution and amount, the runoff curve number, and the time of concentration qp = peak rate qp*= peak rate per unit of rainfall There are a set of curves are available (USDA-SCS, 1986) for estimating qp* given rainfall distribution (SCS Type I, IA, II, or III), the runoff curve number, and the watershed time of concentration.

Pond / Reservoir Outflow Three alternative estimation schemes: Input is measured outflow. Specify water release rate Volume > emergency spillway is released within one day Primarily used for small uncontrolled reservoirs. Reservoir volume > storage extra water is released at a specified rate User specified monthly target volumes for the reservoir

Lateral Subsurface Flow Streamflow contribution, which originates below the surface but is above the zone where rocks are saturated with water. Calculated simultaneously with redistribution in the soil profile (0-2m). Kinematic storage model is used to predict lateral flow in each soil layer: Accounts for variation in conductivity, slope and soil water content Allows for flow upward to an adjacent layer or to the surface

Return Flow Volume of streamflow originating from groundwater SWAT partitions groundwater into two aquifer systems shallow, unconfined aquifer which contributes return flow to streams within the watershed storage water may replenish moisture in the soil profile in very dry conditions or be directly removed by plant uptake (trees) water may also seep into the deep aquifer or be removed by pumping deep, confined aquifer which contributes return flow to streams outside the watershed (water may be removed by pumping)