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Abstract
Under increasing climate crisis, sustainability has been a popular term in the field of landscape architecture. In the current discussion of sustainable landscape, more emphasis is placed on the technical challenges that are directly related to ecological improvements; the appearance of sustainability is seldom mentioned. This thesis examines the meanings and forms in landscape architecture, and explores what meanings and appearance a sustainable landscape should possess. The meaning of sustainability should not be limited within the range of ecology; socially sustainability is equally important in landscape architecture, which requires continuous awareness from users. In this thesis, a model illustrates how forms and meanings in sustainable landscape lead to an increased environmental awareness. A design application would apply the theories in a stream enhancement project.