hardened area meaning in English

淬硬区域

Serious short of water resources restrict city landscape ( sight ) design in north part of china in the arid area , the utilization of local cold resistant plant , disposition of the optimized landscape plant , comeback of the natural lawn landscape , the water used circulation of waterscape , the suitable increase of hardening area and the simulation waterscape were discussed
摘要我国北方干旱区城市景观设计受水资源严重短缺的制约，本文从运用乡土耐寒植物、优化景观植物配置、恢复自然草地景观、水景用水循环使用、适当增加硬化面积和模拟水景等方面进行了探讨。