W - waterhead 中文 - EN166

waterhead 1.水源；水位差。2.【醫學】腦積水。

wateriness
The water current flows over the top of the dentoid baffle to the hydraulic jump as additional momentum . while it is cooperated with a stilling basin , the flowing condition emerged in the basin may be improved greatly and the length and downstream water depth required by the basin can be decreased to a great extent . such an appliance may be also used to solve the problems of insufficiently dissipating water flow energy and aerating flow , which are often faced with those hydraulic engineering constraction as acted by high waterhead , great specific discharge and low froude number 本文通過齒墩頂部的擴散水舌所形成的附加射流，從上部射入水躍，即可改善消力池內的水流流態，又可降低第二共軛水深，減小水躍長度，增進水躍消能效果，同時還能解決大單寬、低佛勞德數條件下摻氣和消能不足的問題，試驗證實它是一種安全、經濟的消能工。
Based on theories and methods of ecological economics , we explain the functions of ecosystem services in chengdu city , sichuan province of china such as conditioning climate , fixing carbon and releasing oxygen , preserving soil , keeping waterhead , purifying environment , and restraining noises , and estimate the economic value of it 摘要運用生態經濟學原理與方法，闡釋了成都市生態系統調節氣候、固碳釋氧、保持土壤、涵養水源、凈化環境和減弱噪聲等生態服務功能，對其經濟價值進行評估。
Through the analysis of hydrological yeologys features by analyzing the gielding water of mining section , the critical value of waterhead , the critical thickness of water - resisting layer and othr hydrological geology factors concerned , the researches on the feasibility of the extraction of eastern mine area liyi mine at - 660m under ground with the menance of high - level limestone water have been done 主要通過水文地質特征分析，從采區涌水量、臨界水頭值及臨界隔水層厚度及相關的水文地質因素對李一礦- 660m水平東翼采區在高水位灰巖水威脅下開采的可行性進行了研究。
According to the types , height and fireproof grade of the buildings , four basic ringed arrangements are brought up , namely the ringed arrangemensts of branch lines , the ringed arrangements of cross mains , the ringed arrangements of feed mains and the ringed arrangements of fire waterhead . on the basis of analyzing the means , characteristic and applicability of the four basic ringed arrangements , several practicality ringed arrangements are brought up , namely the ringed arrangements of branch lines and cross mains , the ringed arrangements of cross mains and feed mains , the ringed arrangements of branch lines and feed mains , the vertical ringed arrangements of feed mains and the ringed arrangements of sprinkler system in the abnormity buildings 根據建筑物的類型、高度和防火等級等因素，提出配水支管環狀、配水干管環狀、立管環狀和消防水源環狀這四種基本環狀形式，分析了四種環狀管網的環狀布置方法、特點和適用性。在此基礎上又提出了支管與干管環狀、干管與立管環狀、支管與立管環狀、立管豎向環狀以及不規則區域環狀等幾種實用的環狀形式。
Meanwhile , the importance of different ecosystem services in urban areas is different . the function of fixing carbon and releasing oxygen is the most important , the function of conditioning climate is the second , and the functions of keeping waterhead , preserving soil , purifying environment , and restraining noises are the last important 同時，城市生態系統各生態服務功能的重要性，由大到小依次為固碳釋氧功能調節氣候功能涵養水源功能保持土壤功能凈化空氣功能與減弱噪聲功能。
Based on research progress on economic value of ecosystem services , taking shenzhen for instance , the authors analyze the functions of ecosystem services such as conditioning climate , fixing carbon and releasing oxygen , preserving soil , keeping waterhead , purifying environment , and restraining noises . economic values of all the six kinds of ecological service functions are calculated 綜述國內外生態系統服務功能價值評估相關研究進展，以深圳市為例，運用生態經濟學原理與方法，闡釋了生態系統調節氣候固碳釋氧保持土壤涵養水源凈化環境和減弱噪聲等生態服務功能，對其經濟價值進行評估。
According to importance of ecosystem services , the function of fixing carbon and releasing oxygen is the most important , the function of conditioning climate is the second , and the functions of keeping waterhead , preserving soil , purifying environment , and restraining noises are also important 依據重要性，由大到小依次為固碳釋氧功能、調節氣候功能、涵養水源功能、保持土壤功能、凈化空氣功能與減弱噪聲功能。
Long - term high temperature not only could decrease the resistibility of the body , but also can cause the pollution of the air and waterhead , the scarcity of food , production of the bacillus and virus , sequentially affect distri - bution of the infectious disease 在長期的高溫條件下，不僅會降低身體的抵抗力，而且可以導致空氣和水源的污染、食物的短缺以及細菌、病毒的產生，從而影響傳染病在人群中的分布。
The investigation about the protection of waterhead forestry in jinxiu county of guangxi 關于廣西金秀水源林保護區情況的調查