RIVERS“Any river is really the summation of the whole valley. To think of it as nothing but water is to

ignore the greater part.” — (Hal Borland, 1957, This Hill, This Valley)

Photo retrieved from: http://disc.sci.gsfc.nasa.gov/oceancolor/additional/sciencefocus/locus/index.shtml/amateur_scientist_guide_000.shtml

Ma. Veah Luisa O. Pascasio

OUTLINE

Introduction

Zonation

Ecosystem

Uses

Facts

INTRODUCTION

Potamology - Greek “potamos”

Lotic environment, which refers to flowing water

Undergo Fluvial Process

Vital in global distribution of nutrients and Earth's

Hydrologic Cycle

ZONATION Wide variety of both abiotic and biotic factors involved

in rivers defines classification in River Zonation.

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ABIOTIC ECOSYSTEMFlow

Habitats, supply of nutrients

Temperature Poikilotherms organisms

Chemistry Oxygen

Substrate Affects intensity of erosion

ABIOTIC ECOSYSTEM

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Photo retrieved from:: http://www.usm.edu/mbrg/MissRiver.html

Photo retrieved from: http://www.usm.edu/mbrg/MissRiver.html

BIOTIC ECOSYSTEM

Bacteria Free-living forms, parasitic

Primary producers Phytoplankton, periphyton

Invertebrates 90% insects, mollusks, crustaceans

Fishes and other vertebrates

BIOTIC ECOSYSTEM

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USESWildlife habitat

Hydroelectric power

Irrigation

Fertile alluvial soil

Drainage and waste

evacuation routes

Tourist attraction and

recreation Photo retrieved from: http://www.happytellus.com/gallery.php?img_id=841

Photo retrieved from: http://blog.travelpod.com/travelphoto/ditchthecube/4/121907/columbia-river-hydroelectric-power-station.jpg/tpod.html

Photos retrieved from: http://www.answersingenesis.org/articles/wog/niagara-falls

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FACTS

Veins of the Earth

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FACTS

Ganges- Holy River worshipped a goddess Ganga

Huang He- China’s sorrow killed almost 5 million people

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FACTS

A raindrop falling into Lake Itasca would arrive at the Gulf of Mexico in about 90 days.

Water skiing was invented in 1922 on the Mississippi River

Photos retrieved from: http://www.fridayfunfacts.com/2011/05/13/old-man-river/

FACTS

Lena- appears to be the longest river in the world when viewed in the map.

Photo retrieved from: file:///home/kara/Downloads/Lena%20River%20Delta%20%20%20Image%20of%20the%20Day.html

FACTS

Photo retrieved from: http:// http://www.ibtimes.com/articles/137338/20110422/earth-day-photos-nasa-breathtaking-photos-of-earth.html

As seen from the Earth's orbit, the Nile has the classic Greek delta (Δ) shape after which River deltas were named.

REFERENCES:

http://library.thinkquest.org/C004240/Use%20of%20river.htm

http://www.buzzle.com/articles/how-are-rivers-formed.html

http://www.toptenz.net/top-10-most-powerful-rivers-in-the-world.php

http://ga.water.usgs.gov/edu/earthrivers.html

http://oddyfunny.blogspot.com/2010/06/top-10-longest-rivers-on-earth.html

http://www.eoearth.org/article/River

http://42explore.com/rivers.htm

http://www.eosnap.com/tag/lena-river/