low river basin 中文意思是什麼
low river basin
解釋
低洼盆地-
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 results show that there are two centers of occurrence of llsw respectively in dong bei and jiang nan ; the regional torrential rain over the yangtze river basin is closely associated with llsw during the major periods of heavy rainfall ; the diurnal variation of the number of occurrence in the middle and low reaches of the yangtze river is the strongest in china there are some significant differences between llj and nallsw in positive season, spatial variation, diurnal variation and field of pressure. by the way, the important effect of inertial stability on heavy rainfall with both low level south - westerly jet and high level northerly strong flow is analyzed theoretically. the results show that the existence of the maximum of inertial stability in the left font of the low level jet is favor of the accumulation of the moist thermal energy, and conditional symmetric instability or convective instability can be expected in this region
另外，慣性穩定性的作用以往不受重視，本文通過對西南低空急流左前方和高空偏北大風軸右後方的慣性穩定性和對稱穩定性的理論分析和實例計算，表明慣性穩定性在伴有高低空急流的暴雨中有重要意義，揭示了梅雨暴雨的一種新的高低空急流耦合機制：低空急流左前方慣性穩定度大值區的存在，有利於低層濕熱能量的積累，使低層傾斜對流的不穩定發展更多期望于條件性對稱不穩定或對流不穩定；高空偏北大風軸（西風急流）的存在，是其右後方（右側）出現對稱不穩定的有利條件，高空相對容易出現干對稱不穩定；慣性穩定性的作用，使低層的傾斜對流更偏向於垂直方向，有利於對流發展，使高層的傾斜對流更偏向於水平方向，有利於高層輻散。 -
The others showed partly decreased, but the degradation of vegetation were obviously in lower reaches of tarim and cherchen river ; in the mountain area of southern xingjian, the forest area were increased, and the others decreased ; in northern xingjian, both the mountain and the plain area increased. they showed the decrease of desert and the increase of oasis ; the change of vegetation cover in the hexi corridor - alax desert were not obviously ; but in chai - damu basin, the area of desert and low cover grassland increased, the others vegetation decreased, especially in the high cover grassland. that showed the great degradation of ecosystem, and the most of degradation was shown in the north hillside of the arjin mountain and qi - lian mountain
而從各個分區來看，情況不盡相同:南疆地區平原區綠洲面積擴大，荒漠面積基本不變，其他類植被面積不同程度縮小，而在塔里木河下游、車爾臣河下游植被退化;南疆山地森林面積略有增加，其他類植被面積略有縮小;北疆的平原區和山區的植被狀況均有改善，表現為荒漠面積縮小，綠洲面積增加;河西走廊一阿拉善地區總體變化不大;但是柴達木盆地的荒漠面積、低覆蓋度草地增加，其他類植被，尤其是甚高覆蓋度植被（草甸）的面積縮小，表明該地區的生態環境退化，而退化表現的主要地區在環柴達木盆地的阿爾金山和祁連山的北坡。 -
In drought or flood years over the yangtze river basin, the features of the establishment, progression and decrease of moisture transport is significantly different, meanwhile the differences of the moisture transport by the monsoon circulation between mid and low latitudes in the northern hemisphere, and by the subtropical high are obvious, so are their convergence, especially over south china sea, the tropical west pacific, the yangtze river basin, north china and north - east in china
（ 4 ）長江流域旱澇年亞澳季風區夏季風水汽輸送的建立、推進、減弱的階段性特徵顯著不同，對應的中低緯季風環流、副高環流等季風系統水汽輸送、匯合也有顯著差別，尤其是在南海、熱帶西太平洋、長江流域、華北和東北等地區。 -
With the analysis methods of eof, reof, wavelet, correlation, running mean, and synthesis, sanxia summer precipitation ( sxsp ) anomaly rules and its reasons is studied. the results show that : ( 1 ) sxsp anomalies exhibit remarkable variation cycle of 15 years, 6 - 7 years and 2 ~ 3 years. the distribution of sxsp is in phase with the middle - low reaches of the yangtze river, while it is out of phase with that of middle and west of sichuan basin
本文採用1959 2001年三峽庫區44個觀測站夏季（ 6 8月）降水量資料、 1959 2001年ncep ncar逐月、逐日資料， 1959 2000年中國160站降水資料、全球逐月海溫資料等，利用eof 、 reof 、小波變換、合成分析、相關分析、滑動平均等方法，研究了三峽庫區夏季降水異常規律及其成因。 -
And with its result, 1 : 2000 digital maps of the surroundings in lake dianchi are minified to 450 square kilometers 1. 10000 digital maps. this paper will deal with the theoretical principle of the applied programs the methods of the underwater topography surveying and the principle of the data processing program and digital mapping program, analyze the rationality and operability and automatic extent of the outside and inside working methods and the data processing program. according to the working experiences, this paper generalizes a low cost, practical and automatic method of underwater topographic survey hi inland lake and river basin
昆明理工大學碩士研究生論文論文摘要（ abs切act ）本文就項目所涉及的理論基礎、技術方法、作業手段、數據處理、內業成圖等方面的內容進行系統地闡述;並介紹了項目實施中所採用的一些特色技術、特殊方法，以期為類似項目在應用方面提供有價值的、合理的、操作性強的、自動化程度高的、能降低成本的、提高經濟效益的實用技術、方法和經驗。
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