According to related statistical data about the study area, the county environmental carrying capacity was comprehensively evalua ted by the method of comprehensive index. The results indicated that the water environment in the study area has been seriously polluted, es pecially by CODCr, the air environment is good, only the pollution of respirable paniculate matter caused by water resources shortage is close to full loads; the land resources still have some potentials for development, and the water scarcity problem is very serious. The comprehensive environmental carrying capacity of Qihe County has been fully loaded, and the main restricting factor is water pollution.%[目的]研究太阳热辐射变化下的绿地类型对降温的影响.[方法]对夏季居住区的5种不同绿地类型(大乔木、小乔木、灌木、草本和裸地)在同一太阳热辐射条件下产生的不同降温效果,及其随日进程过程中的变化规律进行研究.[结果]绿地中的温度变化主要随太阳热辐射强度的日变化而变化,但其中以大乔木为主的绿地,通过树冠层对太阳热辐射的吸收、转移和反射作用,较大缓解了下垫面的温度环境,其下垫面温度与太阳热辐射的相关性R=0.156,降温达1.9℃,而草坪下垫面温度与太阳热辐射的相关性高达R=0.820,降温仅0.6℃,两者的表层温度相比,草坪要比大乔木高2.9℃.[结论]该研究中绿地树冠表温与气温线性关系的建立有助于为今后对较大规模数量的绿地温度测量提供新的方法.
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