Water cuts the pathways of these gulches and rivers and shapes the stones into what you see when it's down at the beach.

水冲刷出了这些沟壑和河流的道路，把石头塑造成了我们在海滩上看到的那些样子。

The authors try to use conceptual model, mathematical model and computer model to reconstruct the formation and evolution of dynamic geomorphic features of tectonic gulches.

尝试从概念模型、数学模型、计算机模型等多个层次构建构造成因的沟谷形成、演变的动态地貌模型。