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东北地区最大雪深、雪压及日光温室垮棚致灾指标

张淑杰1*,陈艳秋2,王萍3,韩秀君2,马树庆4,吴曼丽2,李广霞2,刘庆婺1
  

  1. 1中国气象局沈阳大气环境研究所, 沈阳 110166; 2沈阳中心气象台, 沈阳 110166; 3黑龙江省气象科学研究所, 哈尔滨 150030; 4吉林省气象台, 长春 130062)
  • 出版日期:2016-06-10 发布日期:2016-06-10

The maximum snow depth, snow pressure, and critical indicators of sunlight greenhouse collapsing in Northeast China.

ZHANG Shu-jie1*, CHEN Yan-qiu2, WANG Ping3, HAN Xiu-jun2, MA Shu-qing4, WU Man-li2, LI Guang-xia2, LIU Qing-wu1#br#   

  1. (1Institute of Atmospheric Environment in Shenyang, China Meteorological Administration, Shenyang 110166, China; 2Shenyang Central Meteorological Observatory, Shenyang 110166, China; 3Institute of Meteorological Science of Heilongjiang, Harbin 150030, China; 4Meteorological Observatory of Jilin Province, Changchun 130062, China).
  • Online:2016-06-10 Published:2016-06-10

摘要: 日光温室结构设计需兼顾安全稳固和经济成本,这与温室最大雪荷载量(最大雪深和雪压)有直接关系。本文利用东北地区179个气象站1981—2010年的雪深资料,采用极值Ⅰ型分布函数分别计算了5、10、20、30年一遇(重现期)的雪深和雪压极值,分析其地理分布特征;根据各地日光温室结构特点及雪被类型,确定了日光温室所能承受的最大雪压,得出了东北地区日光温室暴雪垮棚灾害的临界雪压和雪深指标。结果表明: 东北地区最大积雪深度和雪压呈自西向东增加的趋势,黑龙江东部和北部、吉林东部地区为高值区,雪深和雪压分别大于50 cm和0.45 kN·m-2;黑龙江西南部、吉林西部、辽宁西部和南部地区为低值区,雪深和雪压分别小于30 cm和0.25 kN·m-2;温室雪灾致灾指标因雪被类型和温室坡度而异,纯雪的致灾雪深明显大于雪水混合雪深;日光温室的坡度角(30°—40°)越大,致灾雪被深度越大,抗灾性越强;从暴雪致灾指标、各地最大雪深、雪压和光热条件综合来看,东北地区的西、南部比东、北部更适合蔬菜日光温室的发展。

关键词: 丛枝菌根真菌, 重金属, 耐性, 功能差异

Abstract: The design and construction of sunlight greenhouse need to balance the stability and cost, which are mainly affected by the snow load (the maximum snow depth and snow pressure). In this paper, based on the observation data of snow depth collected from 179 weather stations from 1981 to 2010, the maximum snow depth and pressure for recurrence intervals of 5, 10, 20 and 30 years in Northeast China were calculated using the extreme value type I distribution function, and their distribution characteristics were analyzed. The maximum sustainable snow depth and snow pressure were determined based on the type of sunlight greenhouse structure and the characteristics of snowproof coverings. The critical indexes of snow pressure and snow depth for sunlight greenhouse collapsing were concluded. The results showed that the maximum snow depth and snow pressure increased from west to east in Northeast China. The maximum snow depth and snow pressure were higher in the eastern and northern Heilongjiang and eastern Jilin, being over 50 cm and 0.45 kN·m-2, respectively. The maximum snow depth and snow pressure were low in the southwestern Heilongjiang, western Jilin, and western and southern Liaoning, with values of less than 30 cm and 0.25 kN·m-2, respectively. Snowinduced disaster index for sunlight greenhouse varied depending on snow type and slope of greenhouse, and the snow depth that induced sunlight greenhouse collapsing was bigger for pure snow than for snowwater mixture. The snow depth of blizzard disaster increased with the slope angle of sunlight greenhouse increased from 30 to 40 degree. It could be concluded that south and west areas of Northeast China are more suitable for the development of sunlight greenhouse than north and east areas based on disaster index, snow depth and snow pressure, and light and heat conditions.

Key words: arbuscular mycorrhizal fungi, heavy metal, tolerance, functional difference.