USGS - Pontchartrain Geochemistry

Environmental Geochemistry and Sediment Quality in Lake Pontchartrain

Sediment Database and Preliminary Interpretations

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I.	Introduction

II.	Database Structure and Development
	A.	Flat-file vs. Relational Structure
	B.	Data Dictionary
	C.	Data Sources and Locations
	D.	Analytical Methods and Quality Control

III.	Data and Preliminary Interpretations
	A.	Sediment texture and bathymetry
	B.	Organic Carbon
	C.	Inorganic Chemistry
	D.	Organic Components
	E.	Mississippi River Influence - Bonnet Carré Spillway
	F.	Coastal and Inland Waterway Impacts and Sediment Toxicity Considerations
	G.	Conclusions

IV.	References

V.	GIS Layers

VI.	Metadata

VII.	Appendices