渤海水齡及其多源組分分析的數(shù)值研究
發(fā)布時(shí)間：2019-03-02 21:05
【摘要】：水齡作為理解水體動(dòng)力過程與水體物理化學(xué)或者生物過程之間關(guān)系的輔助變量，對(duì)于物質(zhì)在水體中的輸運(yùn)過程以及交換過程有重要意義。對(duì)于某一特定水域來說，其水體來源往往不是單一的，因此對(duì)水域“多源”水齡的研究是很必要的，而目前關(guān)于這方面的研究比較少。本文以渤海為例，基于三維普林斯頓海洋模型（POM）模擬的渤海水動(dòng)力場(chǎng)，利用CART（the Constituent-orientedAge andthe Residence time Theory）理論對(duì)渤海水齡進(jìn)行模擬研究，定量分析了渤海的多源（河流水、降水、外海水）組成，通過對(duì)渤海開邊界條件的選擇討論再返回過程對(duì)渤海水齡的影響，并通過過一系列的數(shù)值實(shí)驗(yàn)分析了控制渤海“多源”水齡的主要?jiǎng)恿C(jī)制以及各水源之間相互作用對(duì)水齡的影響。 渤海水是指由渤海所有來源水（河流水、降水、外海水）共同組成的多源水體，其中，河流水、外海水和降水分別占渤海全部水體體積的12.28%、77.24%和10.48%，，其體積平均水齡分別為：1271天、1969天、1269天。渤海水在渤海中的體積年平均水齡為1810天，隨著離渤海海峽距離的增加，渤海水齡逐漸增大。在渤海環(huán)流的影響下，渤海水齡在空間分布上存在著較明顯的季節(jié)變化，尤其在河口區(qū)域附近。隨著季節(jié)性躍層的出現(xiàn)，渤海水齡垂向分布上也出現(xiàn)一定的分層，且離河口越近渤海水齡的垂向分層越明顯。在渤海海峽“北進(jìn)南出”的海流形態(tài)影響下，渤海海峽處的渤海水齡由南至北逐漸減小。 無返回時(shí)，河流水、降水、外海水和渤海水在渤海中的水齡明顯減小，但是對(duì)其在渤海中濃度和水齡的空間分布特征則沒有多大變化。潮、風(fēng)是影響渤海水齡分布的主要因素，溫鹽躍層對(duì)渤海水齡的影響較小。潮的存在能夠使渤海水齡的增加程度可達(dá)55%以上，并且能夠改變渤海水齡的垂向平均分布形態(tài)；風(fēng)的存在能夠使渤海水齡的減小程度達(dá)30%以上，但對(duì)渤海水齡的垂向平均分布形態(tài)影響很小；溫鹽躍層的存在也能夠使渤海水齡有略微減小的趨勢(shì)，僅在萊州灣東岸有使水齡增大的趨勢(shì)，對(duì)渤海水齡的垂向平均分布形態(tài)的影響微弱。 為了分析渤海各點(diǎn)源與面源間相互作用對(duì)渤海水齡的影響，以海河為中心考慮黃河、遼河和灤河點(diǎn)源對(duì)其水齡的影響，以河流水和降水為中心考慮河流點(diǎn)源對(duì)降水、外海水面源水齡的影響以及降水面源對(duì)河流水點(diǎn)源、外海水面源水齡的影響。黃河、灤河和遼河河流徑流量的存在使海河水在渤海中的濃度和水齡減小約16%和12%；河流水的存在可使渤海水水齡減小約22%，使降水和外海水在渤海中的水齡減小約19%和18%；降水的存在可使渤海水齡減小約11%，使河流水和外海水在渤海中的水齡減小約14%和7%。因此，進(jìn)一步說明了多水源區(qū)域?qū)ζ涠嘣此g研究的必要性。
[Abstract]:As an auxiliary variable to understand the relationship between water dynamic process and physical chemistry or biological process of water body, water age plays an important role in the transport process and exchange process of matter in water body. For a particular water area, the source of the water body is often not single, so it is necessary to study the "multi-source" water age in the water area, but there is little research on it at present. In this paper, taking the Bohai Sea as an example, based on the three-dimensional Princeton ocean model (POM) simulation of the Bohai Sea hydrodynamic field, using the CART (the Constituent-orientedAge andthe Residence time Theory) theory to simulate the Bohai Sea water age, quantitative analysis of the Bohai Sea multi-source (river water), Through the selection of the open boundary conditions in the Bohai Sea, the influence of the return process on the water age in the Bohai Sea is discussed. Through a series of numerical experiments, the main dynamic mechanism of controlling the "multi-source" water age in the Bohai Sea and the influence of the interaction between the water sources on the water age are analyzed. Bohai Sea water is a multi-source water body composed of all sources of water (river water, precipitation, and outer sea water) in the Bohai Sea. Among them, river water, outer sea water and precipitation account for 12.28%, 77.24% and 10.48% of the total volume of the Bohai Sea respectively. The average water age was 1271 days, 1969 days and 1269 days, respectively. The volume of Bohai water in the Bohai Sea is 1810 days. With the increase of distance from the Bohai Strait, the water age of the Bohai Sea gradually increases. Under the influence of Bohai circulation, there are obvious seasonal variations in the spatial distribution of water age in the Bohai Sea, especially near the estuary region. With the emergence of seasonal leaps, the vertical distribution of the Bohai Sea water age also appears a certain layer, and the closer to the estuary, the more obvious the vertical stratification of the Bohai Sea water age. Under the influence of the current pattern of "North in and out of the Bohai Strait", the age of the Bohai Sea water in the Bohai Strait decreases gradually from the south to the north. When there is no return, the water age of river water, precipitation, outer sea water and Bohai sea water in the Bohai Sea decreases obviously, but the spatial distribution characteristics of its concentration and water age in the Bohai Sea do not change much. Tide and wind are the main factors affecting the distribution of water age in the Bohai Sea, and the temperature-salt leaps have little effect on the water age in the Bohai Sea. The presence of tide can increase the water age of the Bohai Sea by more than 55%, and can change the vertical average distribution of the water age of the Bohai Sea. The presence of wind can decrease the water age of Bohai Sea by more than 30%, but has little effect on the vertical average distribution of Bohai Sea water age. The presence of thermohalogen can also slightly decrease the water age in the Bohai Sea, but only on the eastern coast of the Laizhou Bay, and the vertical average distribution pattern of the water age in the Bohai Sea is slightly affected by the presence of the thermohalocline. In order to analyze the influence of interaction between point sources and non-point sources on the water age of Bohai Sea, the influence of point sources of the Yellow River, Liaohe and Luanhe rivers on their water ages is considered with Haihe River as the center, and the river water and precipitation as the center to consider the effect of river point sources on precipitation. The effects of surface water age and precipitation non-point source on river water point source and open sea surface source water age. The runoff of Yellow River, Luanhe River and Liaohe River decreased the concentration and age of Haihe River in Bohai Sea by about 16% and 12%. The presence of river water can reduce the water age of Bohai Sea by about 22%, and the water age of precipitation and outer sea water in Bohai Sea by about 19% and 18%. The presence of precipitation can reduce the water age of Bohai Sea by about 11%, and the water age of river water and outer sea water in Bohai Sea by 14% and 7% respectively. Therefore, it is necessary to study the multi-source water age in multi-source area.
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731
本文編號(hào)：2433476
[Abstract]:As an auxiliary variable to understand the relationship between water dynamic process and physical chemistry or biological process of water body, water age plays an important role in the transport process and exchange process of matter in water body. For a particular water area, the source of the water body is often not single, so it is necessary to study the "multi-source" water age in the water area, but there is little research on it at present. In this paper, taking the Bohai Sea as an example, based on the three-dimensional Princeton ocean model (POM) simulation of the Bohai Sea hydrodynamic field, using the CART (the Constituent-orientedAge andthe Residence time Theory) theory to simulate the Bohai Sea water age, quantitative analysis of the Bohai Sea multi-source (river water), Through the selection of the open boundary conditions in the Bohai Sea, the influence of the return process on the water age in the Bohai Sea is discussed. Through a series of numerical experiments, the main dynamic mechanism of controlling the "multi-source" water age in the Bohai Sea and the influence of the interaction between the water sources on the water age are analyzed. Bohai Sea water is a multi-source water body composed of all sources of water (river water, precipitation, and outer sea water) in the Bohai Sea. Among them, river water, outer sea water and precipitation account for 12.28%, 77.24% and 10.48% of the total volume of the Bohai Sea respectively. The average water age was 1271 days, 1969 days and 1269 days, respectively. The volume of Bohai water in the Bohai Sea is 1810 days. With the increase of distance from the Bohai Strait, the water age of the Bohai Sea gradually increases. Under the influence of Bohai circulation, there are obvious seasonal variations in the spatial distribution of water age in the Bohai Sea, especially near the estuary region. With the emergence of seasonal leaps, the vertical distribution of the Bohai Sea water age also appears a certain layer, and the closer to the estuary, the more obvious the vertical stratification of the Bohai Sea water age. Under the influence of the current pattern of "North in and out of the Bohai Strait", the age of the Bohai Sea water in the Bohai Strait decreases gradually from the south to the north. When there is no return, the water age of river water, precipitation, outer sea water and Bohai sea water in the Bohai Sea decreases obviously, but the spatial distribution characteristics of its concentration and water age in the Bohai Sea do not change much. Tide and wind are the main factors affecting the distribution of water age in the Bohai Sea, and the temperature-salt leaps have little effect on the water age in the Bohai Sea. The presence of tide can increase the water age of the Bohai Sea by more than 55%, and can change the vertical average distribution of the water age of the Bohai Sea. The presence of wind can decrease the water age of Bohai Sea by more than 30%, but has little effect on the vertical average distribution of Bohai Sea water age. The presence of thermohalogen can also slightly decrease the water age in the Bohai Sea, but only on the eastern coast of the Laizhou Bay, and the vertical average distribution pattern of the water age in the Bohai Sea is slightly affected by the presence of the thermohalocline. In order to analyze the influence of interaction between point sources and non-point sources on the water age of Bohai Sea, the influence of point sources of the Yellow River, Liaohe and Luanhe rivers on their water ages is considered with Haihe River as the center, and the river water and precipitation as the center to consider the effect of river point sources on precipitation. The effects of surface water age and precipitation non-point source on river water point source and open sea surface source water age. The runoff of Yellow River, Luanhe River and Liaohe River decreased the concentration and age of Haihe River in Bohai Sea by about 16% and 12%. The presence of river water can reduce the water age of Bohai Sea by about 22%, and the water age of precipitation and outer sea water in Bohai Sea by about 19% and 18%. The presence of precipitation can reduce the water age of Bohai Sea by about 11%, and the water age of river water and outer sea water in Bohai Sea by 14% and 7% respectively. Therefore, it is necessary to study the multi-source water age in multi-source area.
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731
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