石油工程与环境工程学院 环境质量评价 hool of Petroleum and Environmental Engineering, Yan' an University Environmental Impact Assessment 太阳辐射等级数 云量,1/10 太阳辐射等级数 总云量低云量夜间h15°15°<hs35°35°h0s65°h>65° <4/<4 +1 +2 5~7/<4 0 1 +2 +3 8/<4 1 0 +1 +1 5/5~7 0 +1 8/>8 0 0 0 你环境质量评价 Environmental Impact Assessment 云量，1/10 太阳辐射等级数 总云量/低云量 夜间 h0≤15° 15°<h0 ≤35 ° 35°<h0 ≤65° h0>65° ≤4/ ≤4 -2 -1 +1 +2 +3 5~7/ ≤4 -1 0 +1 +2 +3 ≥8/ ≤4 -1 0 0 +1 +1 ≥5/5~7 0 0 0 0 +1 ≥8/ ≥8 0 0 0 0 0 Ⅲ.太阳辐射等级数