WINTER KILL Oxygen Demand in Ice Covered Lakes as It Pertains to Winter Aeration Christopher R. Ellis and Heinz G. Stefan.

Slides:

Advertisements

Similar presentations

Unit Animal Science. Problem Area Aquaculture Lesson Factors Affecting Dissolved Oxygen in Water.

Advertisements

Erosion and Deposition

What is Risk? Stella Swanson Golder Associates Ltd. Betty Hutchinson Northern Mines Monitoring Secretariat Ecological Risk Assessment Workshop June 2005.

Density Stratification of Lakes

Using the Tools that Archaeologists Use Grade 8 C.Kemnitz.

Water Systems Review Assignment

Ecology 15 Freshwater, Marine and Wetland Systems Global Climate Change Ralph Kirby.

Basic Coring Device: Components: Head Tube Cable Piston The Head attaches to the top of the tube. The piston is inside the tube and attaches to the cable.

Aquatic Ecosystems Water has the ability to hold a large amount of energy. Due to this characteristic large bodies of water will take longer to heat up.

+ 2.2 Measuring Abiotic Components. + Investigation Must Choose 2 of the following factors to study Investigate how these factors vary between ecosystems,

Measuring abiotic components  Objectives  To make an exhaustive list of abiotic factors  To discuss the ways they are measured  To critically appraise.

“What Is Lake Turnover?” Post-Reading Questions. 1. What times of year does turnover typically occur? Turnover usually occurs in the spring and fall.

Gas exchange in leaves Aqa book p Homework Green and Red q p.179 Green and red p.183.

Aquatic Biomes Freshwater – Lakes and Ponds – Streams and Rivers – Marshes and Swamps Marine – Oceans – Coastal wetlands.

Turbidity and Water. Turbidity is a measure of water clarity, how much the material suspended in water decreases the passage of light through the water.

From RegentsEarth.com win.

Energy Equation. Chapter 2 Lecture 3 2 Mechanical Energy? Forms of energy that can be converted to MECHANICAL WORK completely and directly by mechanical.

Heat and Heat Transfers. What is heat? Heat is a tricky word and can mean different things depending how you look at the definition. For our purposes.

Pond Ecology.  Lakes and ponds are bodies of open standing water  Their physical conditions and life vary with distance from the shore.

10.1 Aquatic Biomes Temperature is not a limiting factor like it is on land because large amounts of water stabilize temperature. Rate of flow is the.

Snow, Ice & Polar Environmental Change for K-12 Classrooms

Total Change Theorem. The integral of a rate change is the total change.

Introduction The environmental factors such as light, temperature and nutrients interact with each other in the marine environment and play a major role.

Lecture 17 Flat Structures. Aeration for Flat Structures Ideally - uniform air flow – "dead zones" –min. of.2 cfm design rate (this is double) –fines.

Earth Science: 7.1A Glaciers. Glaciers  As recently as 15,000 years ago, up to 30 percent of earth’s land was covered by an glacial ice.  Earth was.

VI. Aquatic Biomes A. Requirements 1. The last 5 weeks have been spent talking about only 30 % of our planet 2. Aquatic biomes are characterized by depth.

Chapter 20, Section 3 Freshwater Ecosystems

Urban Storm Water Runoff and Inland Lakes: A Tale of Two Cities Jarron D. Hewitt and Martin T. Auer Department of Civil and Environmental Engineering,

Methane from the Arctic OCR C21 Science IiC 2011

TEMPLATE DESIGN © R ED I CE: Drilling Ice and taking the next step to inhabiting Mars - BY G. KENNEDY, A. MEWETT, B. MUSOLINO,

1 Life in Water Chapter 3. 2 The Hydrologic Cycle Over 71% of the earth’s surface is covered by water:  Oceans contain 97%.  Polar ice caps and glaciers.

Chapter 11 Water. Properties of water that are important to know for Environmental Science Water is a polar molecule Surface tension Capillary action.

13.1 Streams and Rivers Key Idea:

Introduction to Environmental Engineering Dr. Kagan ERYURUK

Lesson 3 Heating Earth’s Surfaces. How would you set up a model to study the heating of the Earth’s surfaces? Setting up a Model:

CHAPTER 6 Water and Seawater. H 2 O molecule Two hydrogen H and one oxygen O atoms bonded by sharing electrons Two hydrogen H and one oxygen O atoms bonded.

Let’s Find Out!. Erosion is the process by which the surface of the Earth gets worn down. Erosion can be caused by natural elements such as wind, rain,

Stratiform Precipitation Fred Carr COMAP NWP Symposium Monday, 13 December 1999.

Hydrosphere Earth ‘s Water.

Glaciers Chapter 3 Section 4 Pages Objective: Describe the causes and types of glaciers, how they impact land features, and analyze their role.

1.Mouths are quiet. 2.Begin the quick review section of your notes. 3.Raise your hand if you need something.

Optical Effects Light and Color In Nature. The Blue Sky Oxygen and Nitrogen molecules in the Air are the right size to scatter blue light best. Thus if.

#1 A rain forest is found at the base of Mt.

Aquatic Biomes.

Conceptual Physics Heat 1c: Thermal Expansion. Thermal Expansion Most forms of matter expand when heated and contract when cooled. Consider BRIDGES…RAILROAD.

Marine Biomes. 2 Types of Marine Biomes Freshwater –Rivers and Streams –Lakes and Ponds Saltwater –Ocean –Estuaries.

Oxygen Sag Curve By- Prajyoti P. Upganlawar

Chapter 9 Review game Chapter review Packet.

Standard S7L4e Students will describe the characteristics of Earth’s aquatic ecosystems?

Erosion and Deposition

Section 3: Aquatic Ecosystems

Standard S7L4e Students will describe the characteristics of Earth’s aquatic ecosystems.

AIM: What is a stream/river?

Class The Oceans PROPERTIES OF SEA WATER Salinity

Freshwater Systems less than 1% of the water on Earth is available for us as freshwater freshwater exists as surface water groundwater.

Factors Affecting Aquatic Ecosystems

CHAPTER - 15 WATER.

VI. Aquatic Biomes.

Aquatic Biomes.

Ocean Currents 1.

Aquatic Biomes Chapter 7.

Aquatic Ecosystems.

Water Biomes SWBAT identify marine and freshwater ecosystems along the ocean’s coast.

Force Diagrams (Free Body Diagrams)

Presentation transcript:

WINTER KILL

Oxygen Demand in Ice Covered Lakes as It Pertains to Winter Aeration Christopher R. Ellis and Heinz G. Stefan

Oxygen consumption and thus depletion is a function of oxygen concentration and velocity of near sediment water

Winterkill Lake Facts Stratify quickly after ice cover. Oxygen consumption is greater than production. Oxygen production slows or ceases as light penetration decreases. Oxygen consumption is greatest at the water sediment interface. Oxygen consumption decreases as oxygen concentrations fall below 3.8 ppm.

How to cause a winterkill We need to destratify the lake/wetland. We need to create currents that cause the oxygenated water on the top to go to and move along the bottom. Need to make sure our actions are not increasing the amount of oxygen in the system.

Reverse Aeration

REVERSE AERATION Reverse aeration is the use of lake aeration techniques that increase the oxygen concentration and velocity of near sediment water which increases oxygen consumption and depletion

Water currents (convection) Diagram of water flow during aeration operation

Questions?

Equipment Needs Two complete systems ($5,000)

Equipment Needs Two complete systems ($5,000) Generator ($1,300)

Additional Equipment Do meter Hand held depth finder 8-inch ice auger Ice chisel Snow shovel Repair tools for the poly tubing Mud motors

Questions?

How to approach a project.

Questions?

SAFETY FIRST!!!!!!

Safety Equipment Floatcoat or life jacket A throwable flotation device Life guard spikes Ice creepers Rope Ice chisel or board for probing the ice