Abstract:Riparian view (RV) can be described as a synthesis of water, vegetation, beach, and shoreline characteristics based on the water-beach-land structure of riparian environments. In addition, RV is shown as an integrated state influenced by both ecological and visual landscape in a certain spatial range, which is defined as 10 times the watercourse width, that is to say, the maximum among the hydrogeological, visual, ecological controlling boundary line of riparian environments. Stream RV is under destruction and disappearing gradually in China, accompanied by the declined visual and ecological functions of riparian environments due to rapid urbanization, which subsequently leads to a series of problems. Comprehensive assessment plays an important role in the construction and management of the remaining stream RV and promoting them. Moreover, landscape ecology scale, the most uniform and coordinate scale that contains both ecological and visual landscape factors, is a maneuverable method for comprehensive RV assessment studies. Hence, this study was designed to evaluate the current state of stream RV and to further figure out the control value for construction based on the evaluation. Firstly, a comprehensive stream RV assessment system was developed including 4 first-grade indexes (stand for water, vegetation, beach, and shoreline characteristics) and 20 second-grade indexes, followed by establishment of the stream RV value computational model using the AHP(Analytic Hierarchy Process)method. The stream RV state was evaluated and ranked into five categories ("best", indicating the original stream RV is partially preserved; "better", suggesting the stream RV is under destruction; "common", indicating the stream RV suffers from great damage; "worse", implying the stream RV has generally disappeared, and "worst", meaning the original stream RV is completely artificial) based on RV values. Secondly, 12 major streams in Jinjiang City, a city representing overall urbanization in China, were investigated through the assessment of 120 consecutive but obviously different segments divided according to information from GIS analysis and survey. Twenty second-grade indexes were investigated based on 120 plots (each plot stands for a segment); thus, the RV values of 120 stream segments were calculated, and their status were analyzed to obtain an optimized control value of construction for the Jinjiang stream area. The results showed that:(1) Stream RV in Jinjiang was not encouraging; 96.67% of the segments belonged to the "common" (50%), "worse" (40%), and "worst" (1.67%) categories, and no segment belonged to the "best" category; only 3.33% of them reached the "better" category; (2) beach and shoreline characteristics in the "worst" category were 57.5% and 29.17%, respectively, and no vegetation characteristics were in the obvious "best" or "worst" category, which were mainly distributed in the "worse" (36.67%), "common" (50%), and "better" (13.33%) category, while the proportion of water characteristic (except water quality) in "better" category was 56.67%; (3) factors like shoal retention rate, beach width, natural beach retention rate, shoreline land hardness, shoreline bank hardness, sight barrier, and vegetation height have the lowest score(0), and the proportion of these factors having 0 score are 89.17%, 50.83%, 64.17%, 40.83%, 52.50%, 63.33%, and 51.67%, respectively; (4) Twenty optimized control values at two aspects of overall best and each factor best were proposed; if these objectives are achieved, stream RV value would rise from 1.59 to 1.96 and 3.85, respectively, and RV can be increased from the "worse" category to the "common" or the "best" category.