本文選題：山東半島　切入點：海灘剖面監(jiān)測　出處：《海洋科學》2017年04期

【摘要】：為探討山東半島砂質海灘的動力地貌學特征,利用波浪和潮汐資料計算了山東半島浪潮作用指數K和波浪-沉積物參數(Dean參數(Ω)),并進行了地貌類型劃分;結合2012~2015年對山東半島不同地理岸段砂質海岸地形地貌、表層沉積物進行的7次監(jiān)測,對海灘監(jiān)測剖面地形高程和表層沉積物粒度監(jiān)測數據進行了研究,結果表明:山東半島北部煙臺多處海灘為消散型,局部過渡性;威海東側和山東半島南部海灘屬于過渡型或反射型;不同類型沙灘季節(jié)變化差別明顯,消散型海灘夏季容易形成沿岸沙壩,冬季海灘沙壩明顯受到侵蝕;而過渡型或反射型海灘變化趨勢相反,冬季靠近高潮線的部位淤積,形成灘肩,夏季受到侵蝕消失。山東半島北部海灘粒徑較粗,并呈現逐年變粗的趨勢,而山東半島南部粒徑較細且逐年變細;季節(jié)變化受到波浪條件和季節(jié)差異的控制,招遠、龍口、威海、日照地區(qū)較牟平、海陽、青島等平直岸段冬季沉積物比夏季粗。山東半島砂質海灘的地貌形態(tài)受海岸的地理位置、海洋動力條件、岸線走向及沙源供給等多種沉積環(huán)境因素的影響,人類活動的影響可在短期內對海灘造成劇烈變化,引起海岸嚴重侵蝕。
[Abstract]:In order to study the dynamic geomorphological characteristics of sandy beaches in Shandong Peninsula, the wave action index K and the wave-sediment parameter (惟) are calculated by using the wave and tide data, and the geomorphologic types are classified. Combined with 7 times monitoring of sandy coast topography and surface sediments in different coastal sections of Shandong Peninsula from 2012 to 2015, the topographic elevation and surface sediment granularity monitoring data of beach monitoring profile were studied. The results show that many beaches in Yantai, north of Shandong Peninsula, are dissipated and partially transitional, the beaches on the east side of Weihai and the south of Shandong Peninsula belong to transitional or reflective type, and the seasonal variation of different types of beaches is obvious. The beach of dissipative type is easy to form coastal sand dam in summer and obviously eroded in winter, but the transitional or reflective beach tends to change in opposite direction, and the part near the high tide line silts in winter, forming the beach shoulder. The beach diameter in the north of Shandong Peninsula is coarse, and it tends to be coarser year by year, while in the south of Shandong Peninsula, the diameter of the beach is smaller and thinner year by year, the seasonal variation is controlled by the wave condition and the seasonal difference, Zhaoyuan, Longkou, Zhaoyuan, Longkou, etc. The winter sediments in Weihai, Rizhao area, Haiyang and Qingdao are thicker in winter than in summer. The geomorphology of sandy beaches in Shandong Peninsula is affected by the geographical location of the coast and the marine dynamic conditions. Due to the influence of various sedimentary environmental factors such as shoreline strike and sand source supply, the influence of human activities can cause drastic changes to the beach in a short period of time and cause serious erosion of the coast.
【作者單位】： 國土資源部油氣資源和環(huán)境地質重點實驗室青島海洋地質研究所;青島海洋科學與技術國家實驗室海洋地質過程與環(huán)境功能實驗室;中國地質調查局濱海濕地生物地質重點實驗室青島海洋地質研究所;
【基金】：國家自然科學基金(41106060,41406080) 海洋地質保障工程(DD20160144,GZH201200505)~~
【分類號】：P737

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本文編號：1680487