BULK DENSITY, POROSITY, AND SOIL WATER CONTENT
Read: Chapter 1 (p. 12-17), and 6 (p. 93-105) Introduction to Environmental
Soils are often described and classified by their
structure and particle size. However, bulk density and pore
Practice problems: Porosity and bulk density
Bulk density is the weight per unit volume of a soil
1. Calculate the bulk density of a 400 cm3 soil sample
that weighs 575 g (oven dry weight).
2. Calculate the bulk density of a 400 cm3 soil sample
CIVE 4338 IRRIGATION SYSTEMS DESIGN
1) A soil sample is taken with a soil probe and it is placed in a container (aluminum can) for
soil water content determination in the Laboratory. The sample volume is 100 cm3, the
total wet mass
NONPOINT SOURCE POLLUTION
DESCRIPTION: Principles, processes, and control of nonpoint source pollution.
Particular emphasis is placed on NPS problems associated with urban runoff,
agricultural influences on water quality, and impa
Basic Concepts of Diffuse Pollution
Lecture Notes on Chapter 3
Text Reading: pp. 104-132
Watersheds and Drainage Networks
Define watershed, stream order, thalweg, floodplain
Important table from Leopold, Wolman, and Miller (1964) on stream orders
Causes of Diffuse Pollution
Text Reading: pages 50-68, pages 71-94
Nonpoint source pollution is more a social, political, cultural, and economic
issue than a technical issue.
NPS issues require working WITHIN a complex social and legal system.
Introduction and Overview
Text Reading: Preface, pages 1-43, pages 68-71
Define point source pollution.
Define nonpoint source pollution.
Point and nonpoint pollution are legal terms, thus the term diffuse pollution is
sometime used to avoid the
Text Reading: pp. 134-159, 161-177, 180-187, 191-201
The Hydrologic Cycle
NPS pollution is a water-driven process. In order to understand and manage NPS pollution, we
need to understand how water (and to a certain exten