雨量變化 的英文怎麼說
中文拼音 [yǔliángbiànhuà]
雨量變化
英文
variation of rainfall-
In the end, cluster - analysis - based floating control historical regression method with uniform precipitation and atmospheric precipitable water as metoorological covariates could more validly evaluate efficiency of cloud seeding operations and significant level of ca - fcm method was higher than the other methods, because it adopted cluster analysis which highly improved the correlativity between rainfall distributions in the control area and target area, and used grid interpolation which enhanced exactness of calculating precipitation rainfall, and chose atmospheric precipitable water as the covariant which increased the inferential accuracy of natural rainfall on the cloud seeding operational area
最後,得到以降水量和整層大氣可降水量為協變量的ca - fcm方法,由於採用聚類分析( ca )方法,提高了對比區和影響區相關性;採用網格插值技術提高了雨量的計算準確度;引入了不受催化影響的物理協變量(整層大氣可降水量) ,提高了作業區自然降水量估計值的準確性;所以評估效果最好,顯著水平高於0 . 05 。Analyzing the physics structure of vorticity, divergence, vertical velocity, frontogenesis " function, apparent heat source and apparent moist sink etc. indicated the physics fields are favorable for the occurance of the heavy rain over changjiang - huaihe river basin where the physics values are well according to the heavy rainstorm positions ; the low level jet is closely subject to the moisture and the coupled system of the low and the upper level jetstreams induced the strongly " ascending motion ; the intensity of the frontogenesis varies with the development of the rainfall system and reacts the rainfall intensity
主要分析了這次過程中的多種物理量,包括渦度、散度、垂直速度、鋒生函數、視熱源、視水汽匯等,對這一暴雨過程有了比較系統的認識。結果表明:在江淮流域存在著有利於發生暴雨的物理量場配置,渦度、散度、垂直速度等物理量,與暴雨的落區都很吻合的;低空急流的產生不僅有利於水汽的輸送,而且高低空急流的耦合造成了有利於強上升運動的配置;鋒生強度隨著降水系統的發展變化,並影響降水強度。The influence of the cloud droplet spectrum character and the spectrum growth and change is considered, which does not use a cut - off value for conversion from cloud water into rain water process. in the continuous coalescence equation, the particles fall velocity difference is not moved out from the integral, but is integrated in the equation as the function of diameter d to avoid the error of using particles average fall velocity. in the new scheme, generation rate of graupel due to the collection of snow by graupel and the collection of cloud ice by graupel are included
雲中凝結核ccn的數濃度採用超幾何函數表示;雲水向雨水的自動轉換過程採用grabowski ( 1999 )的公式,考慮了雲滴譜的特徵和發展變化對該過程的影響,而不是採用原方案給定閾值的方法描述該過程;對連續碰並方程不再將粒子落速差作為常量提出積分號外,而是直接作為粒子直徑函數在積分號內求解,這樣處理可以迴避使用粒子群的平均落速帶來的誤差;增加了霰和雪、霰和冰晶的碰並微物理過程。The quantity of precipitation varies greatly from year to year in these regions.
在這些地區每年降雨量的變化很大。According to the least twin multiplication to calculating the sensitivity index in several water production functions. thus, the writer obtains the fitted the value of the sensitivity index and the varied rule. at the same time, the writer puts forward a new method named rag a ( real coding based accelerating genetic algorithm ) and combines raga with dpsa to calculating the best irrigation system under the non - sufficient irrigation of well irrigation rice in sanjiang plain
根據《隨機水文學》理論中的時間序列分析法,建立了適合三江平原井灌水稻需水量預報的非平穩時序隨機模型;通過分析降雨隨機特性,選定季節性時序隨機模型,建立了適合三江平原井灌水稻降雨預報的月平均降雨模型;根據最小二乘法,計算出幾種常用水分生產函數中的敏感指數及敏感系數,進而得到三江平原適宜採用的水分生產函數漠型及模型中敏感指數的變化規律;本文提出遺傳動態規劃法( raga ? dp ) ,即採用改進的基於實數編碼的加速遺傳演算法( realcodingbasedacceleratinggeneticalgorithm ,簡稱raga )與動態規劃法( dpsa )相結合,推求非充分灌溉條件下三江平原井灌水稻的最優灌溉制度。Characters of precipitation variation in jinghe watershed
涇河流域降雨量變化特徵分析It is a well - established fact that rainfall leads to changes in bacteriological water quality
雨水會令泳灘水中細菌含量有所變化。The study shows that the early and late seed rains of constructive tree species in evergreen broadleaved forest at chongqing simian mountain had no activity. the bigger the seeds of the species and the earlier or later the seeds of the species matured, the higher the proportion of the seed rain damaged by animals. the quantitative variation of seed rain, active seed rain and seed bank did not take place at the same time. at early time, the number of seed banks of castanopsis fargesii, lithocarpus glabra, quercus myrsinrefolia, castanopsis plasyacantha, cinamomum subavenium. which own more active seed rain increased by geomitric series. the seed banks of castanopsis orthacantha and schima argentea were small, only survived a short time, and did not sprout next year. the quantitative dynamics of seed banks and their increasing or decreasing rates were decided by the proportion damaged by animals, dying speed of seeds and their resistance to pathogens and adverse circumstances, and the state of seed germination
對重慶四面山常綠闊葉林建群種種子雨、種子庫的研究表明,建群種早期和晚期的種子雨無活力;種子偏早或偏晚成熟及大籽粒的樹種,其種子雨被取食的比例大;種子雨、有活力種子雨、種子庫三者的數量變化不一致;有活力種子雨量較大的栲、石櫟、小葉青岡、扁刺栲、香桂等,其種子庫密度在早期以近幾何級數的方式增長,元江栲、銀木荷種子庫小,存在時間短,翌年無一年生萌發苗;種子庫數量動態、消減率動態決定於種子被取食的強度、種子衰老的速度以及種子對病菌、逆境的抗性和種子萌發的整齊性The paper analyzes and summarizes the following laws of distinctive sediment yield produced in storm floods of the region based on predecessors ' study : storm is the main dynamic force of erosive sediment yield and storm, flood and sediment exist an inevitable relation ; the flood occurring time is concentrated with high peaks and huge volume, suddenly rising and suddenly falling and has decisive influence to the formation of a major flood peak in the middle yellow river ; the main reasons of concentrated coarse sediment of the river is severe erosive sediment yield, strong sediment transporting capacity and high sediment concentration ; the important influence of frequent or continued storm floods happened in he - long reach especially in coarse sediment concentrated region to the sediment transport of the yellow river and ; along with the increase of harnessing, regional flood trend is becoming smaller but the variation of sediment quantity is not obvious and the reaction of peak discharge and flood runoff of majority tributaries are not sensitive, showing that a general and normal engineering works can not effectively control regional major floods especially the sediment of an extraordinary flood
摘要在前人研究的基礎上分析總結了該區特有的暴雨洪水產沙規律:暴雨是侵蝕產沙的主要動力,暴雨、洪水、泥沙之間存在著必然的關系;洪水發生時間集中,峰高量大,暴漲暴落,對黃河中游大洪峰的形成具有決定性影響;侵蝕產沙強烈而粗泥沙集中,輸沙能力強,洪水含沙量高,是黃河粗泥沙的集中來源地;河龍區間特別是粗泥沙集中來源區頻繁或連續的暴雨洪水對黃河輸沙有重要影響;隨著治理水平的提高,區域洪水有減小趨勢,但泥沙量變化不明顯,大部分支流的洪峰流量、洪水含水量反應不敏感,說明一般規模和水平的治理工程還不能有效控制區域大洪水特別是特大洪水的泥沙。Annual precipitation series about 50 years is stable and no period ; further, the climate drying and desertification are n ' t caused directly by the decrease of precipitation during the period of the research according to the relational analysis among precipitation temporal - spatial change, runoff, evaporation, potential evapotranspiration and soil water ; longyangxia reservoir which was built in 1986 does n ' t have influence on precipitation up to now ; but annual temperature series in gonghe is unstable, having a linear upward trend, and it increases about 0. 0247, 0. 0422 and 0. 0272c per year, and temperature rise must be having an influence on desertification, but there is a very little temperature change, so that the effect is very small ; annual potential evapotranspiration series is stable too, so climate change has little influence on plant water consumption. 2
在青海共和盆地,近50年的年降雨量序列是平穩的、無周期,其時空變化與徑流、蒸發、潛在蒸散和土壤水分的關系表明,氣候乾燥和嚴重的荒漠化不是由於降雨量減少直接引起,龍羊峽水庫對共和盆地年降雨量變化沒有影響;但是年氣溫序列是非平穩的,茶卡、恰卜恰和貴南的年氣溫平均每年升高0 . 0247 、 0 . 0422和0 . 0272 ,且氣溫升高2 ,年潛在蒸散增加57mm ,盆地內氣候逐漸變乾燥,但影響比較小;由於歷年潛在蒸散序列是平穩的,因此氣候變化對盆地的作物潛在蒸散的影響在研究期內是較小的。Projected change in hong kong s rainfall in the 21st century
香港天文臺公布香港未來百年雨量變化Projected change in hong kong s rainfall in the 21st century 26 august 2005
香港天文臺公布香港未來百年雨量變化( 2005年08月26日)The hong kong observatory announced today 26 august 2005 the results of its recent study on the projected change in hong kong s rainfall in the 21st century
今日八月二十六日香港天文臺公布了香港未來百年雨量變化的研究結果。The hong kong observatory announced today ( 26 august 2005 ) the results of its recent study on the projected change in hong kong s rainfall in the 21st century
今日(八月二十六日)香港天文臺公布了香港未來百年雨量變化的研究結果。Acting director of the hong kong observatory, mr. yeung kai - hing announced the results of its recent study on the projected change in hong kong s rainfall in the 21st century
香港天文臺署理臺長楊繼興先生公布香港未來百年雨量變化的研究結果While there has been a significant improvement in model resolution over the years all the way down to the current 20 km, it is still not precise enough to depict the highly uneven spatial distribution of rainfall
:模式解析度提升到現時的20公里無疑是一大改進,但對于空間分佈極不均勻的雨量變化而言,其精確度仍覺不足見They ranged from sustainable scenarios involving emission controls to rapid economic growth and fossil fuel intensive scenarios. projections of future rainfall changes in hong kong were made by the hong kong observatory using the results of simulations made by global climate models under the various emission scenarios together with observed rainfall in hong kong, southern china and central china through a technique called statistical downscaling
天文臺利用這些全球氣候模式在上述多個不同排放情景下得到的電腦模擬結果,結合過去香港、華南及華中地區錄得的雨量數據,使用統計降尺度的方法綜合評估香港的未來雨量變化。Projections of future rainfall changes in hong kong were made by the hong kong observatory using the results of simulations made by global climate models under the various emission scenarios together with observed rainfall in hong kong, southern china and central china through a technique called statistical downscaling
天文臺利用這些全球氣候模式在上述多個不同排放情景下得到的電腦模擬結果,結合過去香港華南及華中地區錄得的雨量數據,使用統計降尺度的方法綜合評估香港的未來雨量變化。But on the later condition the trend of accumulation turned to be stable in the w3 treatment ( vseawater / v pure water = 1 ) - in root zone soil, variation of sar value accorded with total salt accumulations and sometimes decreased at the treatment where the v seawater / v pure water > 1. contents of cl - and na + which were the main ions and leached obviously in 0 - 60cm soil were greatly influenced by rainfall, but the rainfall did not affected the contents of ca2 +, mg2 + and k + whose ability of leaching is worse than that of cl - and na + in the root zone soil obviously. the vertical distribution of salt ions in the 0 - 60cm soil were mainly affected by the ratio of v seawater / v pure water in the irrigation water on the condition of not enough rainfall, but on the cont
海水灌溉下,耕層土壤中鹽分含量受降雨量影響很大,足夠的降雨條件下,鹽分不會積累,降雨量較低時,鹽分積累明顯,但在50海水處理下趨于平衡狀態;耕層土壤sar值的變化情況和鹽分含量變化情況相一致,在灌溉水中海水濃度大於50時有所下降;土壤中主要鹽離子為cl ~ -和na ~ + , 0 - 60cm土層內, na ~ + 、 cl ~ -明顯的向土壤底層遷移,其在土壤中的含量受降雨影響顯著,而ca ~ ( 2 + ) 、 mg ~ ( 2 + )和k ~ +在土壤中遷移能力較低,其含量受降雨影響較小; 0 - 60cm層次土壤鹽分的縱向分佈在降雨量較低的條件下主要受灌溉水中海水濃度的影響,而在降雨充分的條件下,地面覆蓋程度成為重要的影響鹽分和水分脅迫下菊芋的生理響應及其海水灌溉研究因子之一。The spatial and temporal concentration of chlorophyll a in the lake varied very strongly, the concentrations in the sites located in xin ' an river and effected by human activity were raised obviously from april to august, and were much higher than those in other sites. monthly average concentration for the lake has the same tendency as the rainfall
0月至次年的3月最低,千島沏個湖的葉綠素aff月平均濃度與月降雨顯變化趨勢極為相似:空間總體分佈卜,入湖口和易受人類活動影響的點位葉綠素a的含量明顯高於湖中心和出水口。分享友人