TY - BOOK AU - Ritchey Jd AU - Rumbaugh Jo TI - Subsurface Fluid-Flow (Ground-Water and Vadose Zone)Modeling KW - GROUNDWATER FLOW--MATHEMATICAL MODELS N2 - Subsurface fluid flow (ground-water)modeling serves an important role in resource development and environmental protection. This document presents newly developed methods and guidance for simulating water, air and contaminant movement in vadose and ground-water zones. This introduction provides information about the sponsoring organization, purpose, and an overview of the papers included UR - https://drive.google.com/file/d/1JBHtW0Kmukay4gR8834WlFvFYVwN8VoN/view?usp=drivesdk ER -