| The original meaning of landscape is the natural and artificial surface scenery with aesthetic characteristics.In recent years,with the development of society,landscape architecture is gradually integrating with ecology,psychology,behavior and sociology,becoming a comprehensive discipline.People's perception of landscape usually comes from vision,hearing,smell and other aspects,but vision occupies an unshakable position,because this kind of feeling is the most direct and can give people the overall cognition of landscape.Visual landscape resources quality evaluation is very important,therefore,not only helps tourists to better appreciate the landscape resources,also help the landscape industry related management,planning and design personnel more scientifically and correctly handle the scenic area for the future development direction,such as the determination of suitability of the land development,attractions project site selection or ecological classification protection strategy.This paper summarizes the research status of visual quality evaluation at home and abroad,extracts the key conclusions of previous research results,compares and analyzes the advantages and disadvantages of different methods,and carries out basic research on the theory of landscape visual resource quality evaluation.Then,taking the Da-anding forest park as the actual case,based on the full field investigation of the research area,a visual quality evaluation framework with visual absorption capability,visual sensitivity and beauty as the core indicators was proposed.Five factors,including slope,slope direction,topographic relief,soil stability and vegetation type,were selected to evaluate the visual absorption.Three factors,relative visual distance,visual probability and visibility,were selected to evaluate the visual sensitivity.Three factors,forest type,vegetation richness and forest stock,were selected to evaluate the landscape beauty.In Arc GIS platform under the support of extracting terrain factor and the attribute information of forest resources in the study area,with reference to previous research results,considering the present situation,for each factor was graded assignment,and use the factor superposition method,analytic hierarchy process(ahp)method such as forest park landscape resources outside of the top of the top visual quality comprehensive evaluation has carried on the exploration and practice research.Finally,the scores of the three indicators and the visual quality grading chart of the study area are obtained.The study shows that the overall visual quality of daanding forest park is good: among the 20 visual units,there are 11 first-level visual units of visual sensitivity,occupying more than half of the scenic area.It shows that the existing scenic spots in the study area are rich in resources and the road distribution is reasonable.There are 9 first-level visual units for visual absorption capability.This area is the key plot for landscape resource development and related facilities construction.There are two visual units with first-level beauty level.These two parts of the land have complete forest structure,rich vegetation and high ecological benefits,which bring excellent aesthetic experience to the viewers and are the preferred area of the core landscape area.According to the visual quality of landscape resources evaluation results,with the aid of the method of multiple objective linear programming calculation scenic area management goal,namely the development of land suitability,and according to the evaluation results to the division of functional partition of the study area,the greatest potential for mining the park landscape,and to preserve its complete,vivid and natural,in the hope of the planning scheme can guarantee the top cap for a long time,the health development of forest park. |
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