Understanding the dynamics of water and principles of watershed hydrology is the crucial first step
to effective watershed management
and sustainable water conservation.
Free Definitions for copying

My two text books, now listed

Watershed Hydrology, 2nd Edition
by Peter E. Black (1996)
An ecological approach to the field of
water and energy, in the atmosphere, bio-sphere, terrasphere, hydrosphere, and on the watershed, with chapter-ending study questions and critical thinking challenges.

"Concepts of Watershed Hydrology" is an original, animated and narrated auto tutorial short course for all ages and educational backgrounds.
Complete it in three hours or less.
Download free single page description.

at reasonable, low prices!

Conservation of Water and Related Land Resources, 3rd Edition, by Peter E. Black and Brian L. Fisher, (2000)
with Foreward by Theodore M. Shad.
An historical approach to land and water
law, policy, organizations, pollution, programs, projects, and evaluation.