In arid and semi-arid area, dim ate is dry, sanding is frequent, ecological environment is adverse, so Comprehensive analysis and evaluation in there ares is significant from theory and practice.

• 干旱半干旱沙区气候干燥，大风、沙尘暴天气频繁，生态环境恶劣，因此对沙区城镇绿地所具有的生态效益进行分析与评价具有特殊的理论和实践意义。