What, Why, & How. a limiting nutrient for aquatic plant growth sources include: atmospheric deposition organic matter decomposition excretion by organisms.

Slides:

Advertisements

Similar presentations

Why Study Water Surface – Dirt Minerals Organic materials (any once living thing now decomposed Fertilizer Chemicals Anything spilled Ground – aquifers.

Advertisements

- Environment - Climate - Landscape - Land use - Local Population (animals and humans) Depends on…

Water Quality Tests.

Test 1 Review Chapters 1, 2, 3.

1 What is in Our Water?. Background slides for the whole unit The water cycle Nutrients Eutrophication.

Nitrogen Presentation By Douglas Rittmann, Ph.D., P.E Water/Wastewater Consultant Presented to CE 4153 On April 11, 2006.

Water Use. What is the hydrologic cycle? The water cycle Precipitation Evaporation transpiration.

 DO level: 9.8 ppm  Hardness: 110ppm CaCo 3 (this is high due to limestone aquifers, not a bad thing)  Alkalinity: ppm (also high due to limestone.

 pH is a measure of the acidity or alkalinity of a solution  Pure water is said to be neutral or consisting of a pH of 7  When testing pH you are not.

Problems with Fertilizers.

Temperature Measured with a thermometer Units are ◦C

Unit Factors Affecting Nitrates in Groundwater.. 1. Examine the processes of the nitrogen cycle. 2. Identify the source for most chemical nitrogen fertilizers.

Testing for Water Quality

Chemical Assessment Most complicated, but easiest to do. Extreme natural variations What is normal?

Salinity is the total amount of dissolved salts in water; grams of salts per kilogram of water (g/kg) or as parts per thousand (ppt). Seawater has 11 major.

Nutrient Cycles Environmental Science. A Generalized Cycle Materials often move between the regions of the earth- - Atmosphere - Hydrosphere - Lithosphere.

Agriculture and Nutrient Cycles Lesson 7 December 6, 2010.

Nitrate and Phosphate. Water Quality Nitrate Phosphate.

GLOBE Trainer Certification Program Adapted from 1 DISSOLVED OXYGEN.

What is Alkalinity? the measurement of the buffering capacity of a body of water that is, a body of water’s resistance to the lowering of pH when acids.

Water Quality Anyalysis.  Why analyze nitrate?  High concentrations of nitrate indicate high levels pollution, and promote the growth of algae.  Concentrations.

INVADERS! Exotic Invasive Species. What is an invasive species? A native or indigenous species is one that occurs naturally in a given ecosystem. Non-native.

Water Pollution Indicators of the Mekong Delta Grade 7 Science Saigon South International School Week Without Walls 2010.

1 Parts of Trees By: Lynn Vaughan. 2 WORK! WORK! WORK! A tree has many parts. Each part has a job to do.

Unit Animal Science. Problem Area Aquaculture Lesson Microbial Cycling of Nitrogen.

Chapter 5 Notes Environmental Science. Objectives  Describe the short-term and long-term process of the carbon cycle.  Identify one way that humans.

NOVEMBER 28, 2016 T.O.C. Necessary Nutrients POST LAB

Water Quality Testing.

EUTROPHICATION By: Annette Miles.

Water Quality Rice Creek Watershed.

Adapted From Ms. Hasan Mr. Aguilar Uteach Step 2 Lesson 3, 2012

Objectives Describe the short-term and long-term process of the carbon cycle. Identify one way that humans are affecting the carbon cycle. List the three.

Section 2: The Cycling of Matter

Biogeochemical Cycles

Water Resources: Content Building

Section 2: The Cycling of Matter

1.4.9 Human Impact on an Ecosystem 1

Section 2: The Cycling of Materials

Section 2: The Cycling of Matter

Dissolved Oxygen and Biochemical Oxygen Demand Analyses

Determination of dissolved oxygen free CO2, total alkalinity, total hardness, calcium, magnesium, ammonia, nitrate and phosphorus.

Nitrogen and Phosphorus

2.1 Monitoring Water Quality

The Carbon, Nitrogen and Phosphorus Cycles

The Carbon, Nitrogen and Phosphorus Cycles

Cycling of Matter and Nutrient Cycles

Abiotic Factors Affecting Aquatic Systems

Cycling of matter Section 3.4. Cycling of matter Section 3.4.

The Nitrogen (N2) Cycle Pages

Eutrophication.

Eutrophication Nitrogen and Phosphorus are often limiting factors in plant growth. Therefore they are used in fertilizers to improve plant growth. However,

Nutrient Limitations.

Chapter 5 Objectives List the three stages of the carbon cycle.

Understanding the Environmental Requirements for Fish

The Nitrogen Cycle.

AP Environmental Science Biogeochemical Cycles

Monitoring Water Quality

Ecosystem All the organisms in a community plus abiotic factors

Carbon, Nitrogen & Phosphorus Cycles Ch. 5.2

Section 3.3 The Nitrogen and Phosphorus Cycles

Nutrient Cycles.

How Do You Know an Ecosystem is Healthy?

Presentation transcript:

What, Why, & How

a limiting nutrient for aquatic plant growth sources include: atmospheric deposition organic matter decomposition excretion by organisms urban and agricultural run off (human activity) Nitrates…

Nitrate is highly soluble in water and is stable over a wide range of environmental conditions Excessive amounts of nitrates (and phosphorus) can cause explosive algae and aquatic plant growth Significance of Nitrate…

Excessive concentrations may be harmful to animals, specifically humans In intestines, nitrate is converted to nitrite which reacts with hemoglobin to produce methemoglobin Methemoglobin does not efficiently carry oxygen resulting in methemoglobinemia In the same way, high nitrate (and subsequent nitrite) levels can affect fish Nitrite reacts with hemoglobin to form methemoglobin which cannot carry oxygen effectively Fish will suffocate even if there are adequate DO levels in the water Significance of Nitrate…

LaMotte kits report the amount of nitrate in a water sample as NO3 - -N (nitrate- nitrogen) NO3 - -N levels Natural waters - lower than 1 mg/L is normal Fresh water (U.S.) - above 10 mg/L is considered unsafe for human consumption Acceptable Levels

Measuring Nitrates… Nitrate cannot be measured directly. It must first be converted to nitrite using an oxidation-reduction reaction. Cadmium is used for this reaction. The amount of nitrite is then determined by color.

Sample Collection & Reporting Follow directions in the LaMotte Nitrate test kit to test the water sample. Repeat 3 times. Values should agree with the precision of the kit. If not, discard outlier(s).

Nitrates Measuring [Nitrate + Nitrite] NO 3 - NO 2 - Step 1. The 1 st reagent converts nitrate to nitrite

NO NO 2 - Step 2. The 2 nd reagent reacts with nitrite and creates color. The amount of [nitrate + nitrite] is determined by measuring the color intensity. Nitrates Measuring [Nitrate + Nitrite]

The 2 nd reagent reacts with nitrite and creates color. Repeat step 2 only to measure the amount of nitrite alone in the water sample. NO 2 - Nitrates Measuring [Nitrate + Nitrite]

To calculate the amount of nitrate in the sample: [Nitrate] = [Nitrate + Nitrite] – [Nitrite] Nitrates Calculating [Nitrate]

Perform every six months to test kit chemicals and technique (prepare fresh solutions each time). Follow the instructions in the GLOBE Teacher’s Guide on how to prepare a 2mg/L Standard using the stock nitrate standard. Quality Control

For Help AMSTI-GLOBEThe GLOBE Program Lynn VaughanJerry CobbsAMSTI-GLOBE Resource SpecialistTechnology Specialist Robin Nelson AMSTI-GLOBE Administrator