色调均匀，暗红或黑色，分布于河岸处，形状规则。 红或深绿色，有纹理结构和明显的灌渠，形状规则，分布于河谷、河流两岸冲积平原。 -uniform colors, or black dishes, distributed in the bank, the shape of the rules. Red or dark green, texture and structure of the irrigation channels clear shapes and distribution in