mean water level 中文意思是什麼
mean water level
解釋
常水位-
Based on 2m contour of surveyed bathymetry from 1976 to 1999 and mean - high - tidal line distracted from remote sensing images acquired by landsat - 5 tm from 1976 to 2000 respectively, quantitative analysis about alluvion and erosion as well as the relationship between accretion of modern yellow river delta and the water and sediment discharge of yellow river is made, and the results indicate the mean - high - tidal level is more effective than 2m contour of the bathymetry. it is found that the accretion of modem yellow river delta is becoming less and less, what ' s more, erosion is even more than alluvion in some recent years. diaokou promontory has been eroded seriously since yellow river changed its course in1976
以一般高潮線反映現代黃河三角洲沖淤演變時，從1976年黃河改道清水溝流路入海到2000年，整個黃洞三角洲凈造陸201 . 5km ~ 2 ，淤積有逐漸變慢的趨勢，甚至出現凈蝕退的年份；刁口河嘴大量蝕退，蝕退速率開始快速，后來逐漸變慢；清水溝河嘴大量淤積，淤積速率開始迅速，后來逐漸變慢，甚至出現凈蝕退；清水溝河嘴南側到支脈溝一段岸線與刁口河嘴以西到灣灣溝一段岸線基本穩定。 -
The analysis of the meteorological and hydrological data shows that there is close correlation between the water level of the xijiang river and the upper reach water level and areal mean rainfall
摘要根據氣象和水文資料，以上游面雨量、水位值為預報因子，以西江流域的梧州水位為預報量，發現預報因子與預報量有很好的相關性。 -
Mean sea level variations are caused by the changes of sea water density and global ocean mass, it is an important content of studying global climate change
摘要海平面變化是海水密度和海水總質量變化的結果，是全球氣候變化研究的重要內容之一。 -
Information on the nearest approach together with an estimate of the minimum central pressure of each tropical cyclone during its closest approach, the maximum winds at king s park and chek lap kok and waglan island, the minimum mean sea - level pressure recorded at the hong kong observatory and the maximum storm surge ( the excess of the actual water level over that predicted in the tide tables ) recorded at various tide stations in hong kong are included
資料包括熱帶氣旋最接近香港時的位置及時間和當時估計熱帶氣旋中心附近的最低氣壓、京士柏及赤?角及橫瀾島錄得的最高風速、香港天文臺錄得的最低平均海平面氣壓以及香港各潮汐測量站錄得的最大風暴潮（即實際水位高出潮汐表中預計的部分） 。 -
Information on the nearest approach together with an estimate of the minimum central pressure of each tropical cyclone during its closest approach, the maximum winds at king s park and waglan island, the minimum mean sea - level pressure recorded at the hong kong observatory and the maximum storm surge the excess, in metres, of the actual water level over that predicted in the tide tables recorded at various tide stations in hong kong are included
資料包括熱帶氣旋最接近香港時的位置及時間和當時估計熱帶氣旋中心附近的最低氣壓京士柏及橫瀾島錄得的最高風速香港天文臺錄得的最低平均海平面氣壓以及香港各潮汐測量站錄得的最大風暴潮即實際水位高出潮汐表中預計的部分，單位為米。 -
These mean images reveal not only the synoptic cloud systems but also the mesoscale convective cloud cluster. the long - term high water level of mid - yangtze river and the frequent flood peak of the upper yangtze river from the middle of june to the middle of august in 1998 was caused by the high frequent activity of convection
旬月和季平均雲圖表明，長江上游從6月中旬開始到8月中旬長達兩個多月對流的頻繁發生是「 98洪水」長江上游洪峰多，中游高水位維持時間長的重要原因。 -
The correlations between the tide level of coast tidal gauge stations and the tide level of offshore sand ridges, and between mean high water level and mean water level as well as mean sea - level were discussed when studying the tidal gauge records
在潮位資料的分析過程中還探討了沿岸驗潮站與岸外沙洲潮位的相關性以及平均潮位、平均高潮位和平均海平面之間的相關關系。 -
Such a rise shortens the return period of high water level by half, that is, a high water level with a return period of 50 years would have a return period of about 25 years after the rise in the mean sea level.
楊繼興說：維多利亞港的海平面在過去五十年上升了0 . 12米，這個升幅會使最高水位的重現周期縮短約一半。即是說，原本重現周期是五十年的水位，在海平面升高后的重現周期會是大約二十五年。 -
Such a rise shortens the return period of high water level by half, that is, a high water level with a return period of 50 years would have a return period of about 25 years after the rise in the mean sea level. " nevertheless, as the effects of storm surges and long term sea level rise have been taken into consideration in the design of coastal projects, it is unlikely that the sea level will pose a threat to hong kong in the near future
12米，這個升幅會使最高水位的重現周期縮短約一半。即是說，原本重現周期是五十年的水位，在海平面升高后的重現周期會是大約二十五年。雖然如此，由於香港的海岸工程在設計時已考慮了風暴潮效應及海平面可能會上升，相信在未來一段時間內香港的海面高度仍不會對香港構成威脅。 -
In the image preprocessing that includes image smoothing and linear gray level transformation, the author brings forward a mended linear gray level transformation based on mean of gray value to enhance the image contrast. in the segmentation the paper presents an arithmetic taking the area of the pointers and construction feature of the water meter into consideration, which can extract the part of pointers in the special space of the water meter, and then binarizes image using a dynamic threshold based on the area of the pointer. the design can enhance the recognition rate for the next step
在預處理中提出了一種基於灰度期望的分段線性變換；對水表的圖像分割，提出基於面積和結構信息的二值化自動分割，包括基於結構和灰度特徵的哈夫變換分割法（指針信息區的提取）和基於指針面積的特徵的閾值分割（指針提取） ；針對指針圖像的非均勻光照、背影等干擾，提出基於多特徵的分區模板匹配法對指針的方向進行識別，從而計算出讀數。 -
From the prediction results of several methods we have known that : the annual mean water level in the 2010 will decrease about 0. 6m comparing with present average level
從多種方法預測結果可知，灌區節水工程實施后地下水位較目前平均下降約0 . 6米左右，下降幅度較大。
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