Overview

Better Assessment Science Integrating Point and Non-point Sources (BASINS) is a multipurpose environmental analysis system designed to help regional, state, and local agencies perform watershed- and water quality-based studies.

It was developed by the U.S. Environmental Protection Agency to assist in watershed management and TMDL development by integrating environmental data, analysis tools, and watershed and water quality models.

A geographic information system (GIS) provides the integrating framework for BASINS. GIS organizes spatial information so it can be displayed as maps, tables, or graphics. GIS allows the user to analyze landscape information and display relationships among data. Through the use of GIS, BASINS has the flexibility to display and integrate a wide range of information (e.g., land use, point source discharges, and water supply withdrawals) at a scale chosen by the user.

BASINS makes watershed and water quality studies easier by bringing together key data and analytical components in one tool. BASINS allows users to efficiently access national environmental information, incorporate local site-specific data, apply assessment and planning tools, and run a variety of proven, robust non-point loading and water quality models.

Tool Resources:

• BASINS Home
• What's Different about BASINS 4.5?
• Framework and Features
• User Information and Guidance
• Download and Installation
• Meteorological Data
• Metadata
• Model Plugins

Audience

BASINS is a useful tool for those interested in watershed management, development of total maximum daily loads (TMDLs), coastal zone management, non-point source programs, water quality modeling, and National Pollutant Discharge Elimination System (NDPES) permitting.