This paper summarizes and analyzes several factors affecting drought, and applies the fuzzy synthetic evaluating theory to the drought index evaluation in Guanzhong region.
本文在总结分析影响干旱发生的多种因素的基础上，将模糊综合评价具体应用到干旱指标评价研究中。
It is proved that the drought index exists 5 ~ 8 a period in the most areas, it exists 12-13 a and 15-16 a period in some areas, it also exists 20 a period in specific area.
中国春季干旱指数大多存在5 ~8年的短周期年际周期变化，12 ~13年、15 ~16年的长周年际周期变化存在于部分区域，个别区域还存在20年长周期年际周期变化。
Finally, assessment the model of area covered by drought, the area affected by drought and the economic losses of agriculture by drought is established according the drought index.
最后依据干旱指数建立了干旱受灾面积和成灾面积评估模式，以及干旱经济损失评估模式。
The maps show a widely recognized indicator known as the Palmer Drought Severity Index.
该地图展现了公认的指标—帕尔默干旱强度指数。
The result shows that runoff drought index and spring wheat climate output of Hexi irrigational area appears opposite variation tendency.
研究结果表明，径流量干旱指数与河西灌溉区春小麦气候产量呈反位相的变化趋势。
The result shows that runoff drought index and spring wheat climate output of Hexi irrigational area present opposite variation tendency of phase.
研究结果表明，径流量干旱指数与河西灌溉区春小麦气候产量呈反位相的变化趋势。
Water balance drought flood index is used as the agricultural meteorological index of flood and humidity harm.
洪涝和湿害的农业气象指标用水分平衡旱涝指标来表示。
Based on the principle of soil water balance, including precipitation, temperature and other observations, this article built a model of soil drought index.
从土壤水分平衡原理出发，以降水量、温度和区域水文观测等因子为基础，建立了土壤干旱指数模型。
The advancement of comprehensive drought resistant index of crops and its limitation on application were explicated.
阐述了作物综合抗旱性指标的研究进展、各指标应用的局限性。
Based on the consideration of grassland water shortage and productivity, water shortage index and drought judgment index were presented.
在充分考虑草地土壤水分亏缺和生产力水平的基础上，构造了草地缺水指数和旱灾评判系数。
The plant drought resistance determined by a comprehensive physiological index.
同时表明，抗旱性是一个综合指标。
The index of summer drought intensity was combined with the summer drought probability.
将伏旱强度指数与伏旱发生的概率联系起来。
It is found that el Nino, relative sunspot number and sub-high integrated index in west Pacific well correspond to the regularity of drought and flood.
研究发现埃尔·尼诺、太阳黑子相对数、西太平洋副高综合指数与旱涝变化规律有很好的对应关系，并有很高的相关系数。
Thus the drought area in different regions could be determined and regression equations to estimate surface drought index by vegetation supply water index were established.
由此，用植被供水指数确定了各地州的受灾面积，并建立了植被供水指数估计地面干旱指数的遥感方程。
At last, a drought index model was developed by considering the water requirement of winter wheat and the available soil water content.
最后，根据冬小麦的需水规律和土壤有效水含量构造干旱指数模型。
The index of drought resistance lies in yield increase and drought resistance.
抗旱指数是抗旱性和丰产性的有机结合，杂交育种是提高丰产性的关键。
Similar to the method of Z index of precipitation, a trial research is made on monitoring drought by the amount of cloud, and the method of Z index of cloud amount is established.
类似于降水量Z指标法对旱情的监测，进行了云参数监测旱情的研究，建立了云量监测的Z指标法。
The water physiological index of plant is an important basis that is used to distinguish the drought resistance of plants.
植物水分生理指标，是判别植物抗旱性的重要依据。
Because the change of the main factor of drought is given by the daytime precipitation and the highest temperature every day, the index is real-time, sensitive and consistent.
该指数可根据每日最新日降水值和日最高气温值的变化，及时给出影响干旱程度变化的主要气象因素的变化，使干旱监测具有实时性、敏感性和连贯性。
There are a few quantitative ones among multitudinous drought indexes and the quantification index based on the soil moisture is less.
在众多作物受旱程度指标中定量化的不多，基于土壤水分的量化指标更少。
Index system on comprehensive judgment of drought resistance ability of the clones was suggested and the drought resistance ability of the clones was judged comprehensively.
建立了抗旱性筛选的指标体系，对无性系抗旱能力进行了综合评价。
Shaanxi province drought months in recent years were analysed by examining the atmosphere general circulation features, drought index S and the signal to noise ratio.
从大气环流特征、干旱指数S及信噪比等三个方面对陕西省近几年干旱月份进行了分析。
On the various indexs research in the physiological and biochemical change under drought stress, the index selection is sole and disperse, so there are hardly systematic research reports.
有关茶树在干旱胁迫下生理生化变化的各种指标的研究中，选取的指标单一而分散，较为系统的研究报道没有出现。
The fact that drought is the key limiting factor for black locust growth was further proved in the correlation analysis between the chronologies and the humidity index of Lanzhou city.
之后通过树轮年表和湿润指数的相关性分析，也证明了干旱是影响刺槐生长的主要限制因子。
The index of drought resistance after blossom are greatly affected by the cross effects of fertilize to soil in early winter and spray rare elements nutrition to the leaves in the following spring.
花后大扁杏的抗旱性指标的变化，主要受秋季土壤施肥和春季杏树展叶后叶面喷施微肥的交互作用影响。
So, the change tendency of runoff drought index can be used to predict the variation tendency of output of spring wheat in the future of this area.
因此，可利用径流量干旱指数的变化来预测该地区未来春小麦产量变化趋势。
So, the change tendency of runoff drought index can be used to predict the variation tendency of output of spring wheat in the fu…
因此，可利用径流量干旱指数的变化来预测该地区未来春小麦产量变化趋势。
Based on the data of the monitoring of NOAA meteorological satellite and the observed soil moisture at the surface observation station, drought index was expatiated in Anhui Province.
本文对利用NOAA气象卫星遥感监测资料和土壤水分人工观测资料开展安徽省干旱监测的指标进行了介绍。
The results showed that S drought index accorded with drought condition in Altay.
结果表明：S指数能较好地反映阿勒泰地区的干旱情况。
The results showed that S drought index accorded with drought condition in Altay.
结果表明：S指数能较好地反映阿勒泰地区的干旱情况。
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