川江中下游护岸林淤沙能力评估模型的研究

Research on Evaluation Model for Riverbank Protection Forest Sand Accumulation along the Main Branches of Changjiang River in Sichuan Province

根据川江中下游水文特征基本相似的35个江岸防护林典型标准地资料,选用数量化理论Ⅰ建立了年均淤沙厚度与林分胸高断面积、江岸坡度、林分结构类型、江岸形状、草本层盖度五因子之间的数量化数学模型。利用江岸状况调查、规划设计和林木生长过程测定资料,可采用该数学模型预测出造林后任意一年的淤沙厚度和淤沙量。

Based on the materials of 35 typical riverbank protection standard forest sites which are basically similar to the hydrological characteristic of the main branches of Changjiang River in Sichuan Province, this article takes the theory of magnitude Ⅰ to establish the mathematic model between annual average sand accumulation thickness and five elements, such as cutting stand, riverbank slope, stand structure types, riverbank shape and grass coverage. The materials of riverbank situation surveying, planning and designing and forest growth procedure from riverbank status being used, the mathematic model to forecast sand accumulation thickness and quantity can be applied.