The perennial vegetation is expected to a . ordosica dominated and h . scoparium stably co - existed , together with an annual plant population of e . poaeoides and b . dasyphylla , which is greatly fluctuated with annual precipitation pattern 其将与因年际间降水量及其分布差异引起的种群密度等特征波动的一年生草本小画眉草和雾冰藜种群长期共存。
The global land monthly precipitation data ( prec / c ) are used to investigate the relation between the global land annual precipitation and enso during 1948 - 2000 , and the results of composite analysis are tested with monte carlo simulations 用最新创建的全球陆地月降水资料( prec / l ) ，研究了1948 - 2000年期间的enso事件与全球陆地年降水量的关系。
The results showed that the mean annual temperature and the mean monthly temperature in february , september and december had increased significantly . the annual precipitation did not show significant changes but its distribution pattern had changed obviously 结果表明30年来年平均气温、 2 、 9 、 12月均温明显增高；年降水未发生显著变化，降水分配模式变化明显。
2 . with the method of multiple point regression , a general formula was established to estimate the annual precipitation at different elevation . rr = 1056 . 9 + luhzr in the equation : r x is the increasing rate of annual precipitation , and unit is mm / m 根据多点回归建立起估算区境任一海拔高度年降水量的通式： rz = 1056 . 9 + r hz r式中： r为需要计算点年降水量的垂直递增率，单位为mm / m 。
This paper introduced the detaild formulas of numerical simulation for annual precipitation sequence and monthly precipitation sequence , and provided a whole computer program for each system model , which makes the results of the paper used more conveniently 同时，本文给出了详细的年降雨序列和月降雨序列随机模拟的计算公式，并配有一套完整的计算机程序，这给本文成果的实际应用可望带来很大的方便。
The annual precipitation in ningnan area stably ranges from 270mm to 584mm , and spatially decreases from south to north . with the reduction of regional rainfall or decrease in time scale ( year , month , and 10 - days ) , variability is more significant 区域年降水在空间分布上，由南到北降水量逐渐降低；随着区域降水量的降低，变异性进一步增加；随着时间尺度(年、月、旬)的变小，降水量的变异性增加。
In recent 44 years , the trends of the precipitation in characteristic period of time and annual precipitation in different regions are significant . in some regions , the trend of the precipitation in characteristic period of time can denote the trend of annual precipitation 近44年来，各区域特征时段降水量和年降水量有各自的变化趋势，在某些区域，可以用特征时段降水量的变化趋势表示年降水量的变化趋势。
Abstract : according to the base flow separation results from hydrographs in many watershed , the best regression equation expressing the relationship between annual precipitation infiltration coefficient and the weight of different strata area to total area of the watershed is established . the equation can be used to calculate the precipitation infiltration recharge for different ground water basins in which the strata distribution and the precipitation are given . the precipitation recharge is equivalent to the ground water recharge in some mountainous area where the exploitation of ground water resources are far from being sufficient 文摘:降水入渗补给系数与地层相关分析的目的，是为推求山丘区降水入渗补给量.鲁中山丘区是由各种不同地层出露组成的山丘区域.在多个水文流域基流分割基础上，建立流域年均降水入渗补给系数与各种地层出露面积占流域总面积权重间的最佳回归方程，利用该回归方程和地层分布及降水量推算不同地下水流域的降水入渗补给量.在地下水开发利用不高的山丘区，降水入渗补给量即为地下水补给量
Grey correlation analyses show that at the time axis , the factors influencing the diversity of plants strongly are primary productivity , annual precipitation , relative humidity , mean temperature in january , and potential evaporation etc . the spatial distribution pattern of terrestrial vertebrates including mammals , birds , reptilians and amphibians were studied with methods similar to those for plants . 7 d 通过d以排序表明， d以第一轴与多个环境因子均呈显著相关，其中与经度、年均温、年均降水量、年均相对湿度、潜在蒸发量、初级生产力呈正相关，与纬度、海拔、年均风速、寒冷指数、年均日照率呈负相关。
There is no perspicuity verge between the west and the east of qinling mountains , so we have to draw a line to divide it into two parts . by analyzing the chang of observation spot " s precipitation in summer and in autumn on the same latitude , we can make a conclusion that 108 ewill be the line possibly . the paper was going on under the background of global chang by compairing the variation characteristics of norm annual air temperature and norm annual precipitation , and by compairing air temperature and precipitation over the season , 秦岭东部地区气候变化总体趋势为降水减少、气温递增，其中近50年的时间里，气温共递增0 . 185 ，同时降水减少75 . 35mm ，表现为暖干化特点，其暖化的特点表现在冬半年的暖冬尤其是冬季增温强烈，干化则主要集中在夏季降水的锐减；而秦岭西部地区则降水减少的同111气温下降，近50年来，气温共下降0
