次表層徑流 的英文怎麼說

中文拼音 [biǎocéngjìngliú]
次表層徑流 英文
subsurface runoff
  • : Ⅰ名詞1 (次序; 等第) order; sequence 2 [書面語] (出外遠行時停留的處所) stopping place on a jou...
  • : Ⅰ名詞1 (外面;外表) outside; surface; external 2 (中表親戚) the relationship between the child...
  • : i 量詞1 (用於重疊、積累的東西 如樓層、階層、地層) storey; tier; stratum 2 (用於可以分項分步的...
  • : Ⅰ名詞1 (狹窄的道路; 小路) footpath; path; track 2 (達到目的的方法) way; means 3 (直徑的簡稱...
  • : Ⅰ動1 (液體移動; 流動) flow 2 (移動不定) drift; move; wander 3 (流傳; 傳播) spread 4 (向壞...
  • 表層 : skin layer; superficial coat; veneer; surface; sexine; bloom; supercrust; surface layer表層沉積 [...
  1. On the basis of the study of the theory and appraise method on land use in the small towns from home and abroad, this paper at first conducts a deep study on the development and role of the small towns, indicating that its development has sawn an uneven development phrase and becomes a carrier of the enterprises, a pool of surplus laborers, a hub of material exchanges between the rural and urban areas, a base of spiritual civilization, an important way to achieve urbanization. second, it conducts a study on the situation and features and the problems the land use, indicating that the efficiency of the land use is low, which has a direct influence on the development of agriculture and the role of the small towns. and the study of the demand of the land indicates the shortage of land is serious, and the small town must rationally use the land and increases its intensive role and the economical efficiency to meet the demand

    在分析國內外已有關于小城鎮土地利用的理論與評價方法的基礎上,首先對小城鎮在我國的發展、地位和作用進行了深入的分析,判明我國小城鎮發展經歷了一個曲折向上的發展階段,已成為鄉鎮企業的載體,農村剩餘勞動力的蓄水池,城鄉物資交的樞紐,農村精神文明的基地,是我國城市化的重要途;其,對小城鎮土地資源利用現狀和特徵進行了探討,並對發展小城鎮建設導致的土地利用問題進行了剖析,明目前我國大多數小城鎮土地效益和規模效益低下,佔用耕地過多,直接影響農業的發展,影響小城鎮的地位和作用;通過小城鎮土地供需分析研究明,我國土地短缺十分嚴峻,小城鎮土地需求缺口較大,小城鎮必須合理利用現有土地,增強集約功能和土地經濟效益,從而緩解需求壓力;最後,論文通過運用特爾菲法,描述統計分析法、多元統計分析(主成分分析)法和系統分析法中的分析法( ahp )等一系列方法,結合定性和定量兩方面,從土地質量、土地資源數量與結構、土地經濟效益、環境效益、社會效益等五個方面進行分析,篩選、建立了土地資源利用評價指標體系,在因子評價的基礎上,建立了土地利用綜合評價模型,並給出了評價過程和方法。
  2. In this thesis, first, reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences. then, researches on block stability problems were reviewed, and according to the relationship between grain size and incipient velocity, it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity, and 50 % increase of the velocity will result in about 40 times change of the block weight. after that, experiments were conducted in a flume, focusing on the relationship between incipient velocity and some main factors including block weight, water depth over the dam, cross - section size, block material and river bed material

    本文首先根據散拋石壩損毀情況的現場調查資料,結合有關專家多年的整治經驗,總結出壩體的損毀原因及影響因素;對現有塊體穩定性的研究成果進行回顧和總結,並針對散拋石壩的直接損毀現象,結合山區河的水、地形特點,利用塊體粒與起動速的關系,提出塊體穩定重量與起動速高方成正比的概念,速50的增長可能導致塊體穩定重量接近40倍的變化;通過二維變坡水槽試驗,研究了壩體穩定的主要影響因素,包括塊體重量、壩頂水深、斷面尺寸、塊體材料(塊石和卵石兩種) 、護底等,結果明對于山區河,試圖僅僅通過增加壩體單個塊體重量或斷面尺寸來提高壩體穩定性效果甚微;最後,根據西部地區的自然、經濟、交通等條件,提出可以採用柔性混凝土鉸鏈體等一類整體性較好的護面作為散拋石壩的防沖毀措施,以期取得良好的工程效果。
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