Keyline® in the AR Sandbox #2: Landform Water Divides

The video tutorial explores the concept of landforms, focusing on the main ridge, primary ridges, and valleys. It discusses the key line design system developed by PA Yeomans and modernized by Darren Doherty. The tutorial explains how these landforms function as hydrological divides, creating self-contained watersheds that can be used as land management units. The fractal nature of these landforms is highlighted, showing how their definitions change with scale. The importance of mapping watersheds for effective land management is emphasized, setting the stage for future design layers in the course.

Who is credited with developing the Key Line design system?

• Darren Doherty

• PA Yeomans

• Geoff Lawton

• Bill Mollison

What is the main Ridge often compared to in the landscape?

• A valley

• The spine

• A mountain

• A river

How does the concept of scale affect the understanding of ridges?

• It changes the color of the ridges

• It alters the size of the valleys

• It shifts the definition of main and primary ridges

• It affects the height of the ridges

What is a primary valley considered in terms of hydrology?

• A shared watershed

• A self-contained watershed

• A drainage basin

• A floodplain

Why is it important to map the watershed of design sites?

• To determine the best management for each zone

• To find the highest point in the landscape

• To locate the main Ridge

• To identify the largest valley