本文關(guān)鍵詞：近30年遼河口蓋州灘沉積環(huán)境研究　出處：《海洋學(xué)報(bào)》2017年07期 　論文類型：期刊論文

  更多相關(guān)文章： 遼河口 蓋州灘 地貌演化 沉積速率

【摘要】：對(duì)采自遼河口蓋州灘北部柱狀樣進(jìn)行沉積物粒度分析和~(137) Cs、~(210) Pb年代測(cè)試,結(jié)合1988年、1994年、1999年和2013年4期遙感影像數(shù)據(jù),對(duì)近30年蓋州灘沉積環(huán)境進(jìn)行了研究。沉積物樣品主要為砂質(zhì)粉砂和粉砂,分選較差,極正偏,峰態(tài)很窄至寬。近30年來(lái)蓋州灘沉積速率為2.83cm/a,沉積較為快速。1969年,盤(pán)山建閘后,雖然遼河入海徑流量和輸沙量減少,蓋州灘沉積物粒度仍受到徑流、潮流和波浪的共同影響,以徑流影響為主;1999年,遼河截流后,徑流影響較弱,潮流和波浪對(duì)沉積物改造作用增強(qiáng)。蓋州灘發(fā)育過(guò)程受到徑流、潮流和波浪以及人類活動(dòng)的共同影響,但近30年來(lái)蓋州灘主體形態(tài)無(wú)明顯變化,僅北部沙洲不斷淤高,與主沙體連為一起,南部受波浪改造呈鳥(niǎo)足狀。
[Abstract]:The sediment grain size analysis and the dating test of Cs137Cszhuanjin210Pb from the columnar samples collected from the northern Gaizhou beach of Liaohe estuary were carried out, combined with the data from 1988 and 1994. In 1999 and 2013, four issues of remote sensing image data were used to study the sedimentary environment of Gaizhou beach in recent 30 years. The sediment samples were mainly sandy silt and silt with poor sorting and very positive deviation. The peak state is very narrow to wide. In recent 30 years, the deposition rate of Gaizhou beach is 2.83 cm / a, the deposition rate is relatively fast. In 1969, after the construction of Panshan sluice, the runoff and sediment transport of Liaohe River into the sea decreased. The grain size of sediment in Gaizhou beach is still affected by runoff, tidal current and wave, mainly by runoff. In 1999, after the closure of Liaohe River, the influence of runoff was weak, and the effect of tidal current and wave on sediment transformation was enhanced. The development process of Gaizhou beach was affected by runoff, tidal current and wave, as well as human activities. However, in the past 30 years, the main body of the beach in Gaizhou has no obvious change, except that the sand banks in the north have been silt continuously, connected with the main sand body, and the south has been transformed by waves in the form of bird feet.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)海洋學(xué)院;廈門(mén)大學(xué)海洋與地球?qū)W院;
【基金】：國(guó)土資源部地質(zhì)環(huán)境治理專項(xiàng)子課題;遼河油田地質(zhì)環(huán)境治理效果定量評(píng)價(jià)研究
【分類號(hào)】：P736.21
【正文快照】： 1引言海岸帶是人類生存和發(fā)展的主要活動(dòng)區(qū)域之一,受全球氣候變化、陸地變化、河流變遷、海平面上升以及人類活動(dòng)的影響,具有敏感性、復(fù)雜性和多變性。河口地區(qū)因受入海河流和海洋動(dòng)力的雙重作用,其沉積特征能反映河口地區(qū)河流、波浪、潮汐等作用的變化。20世紀(jì)80年代初,國(guó)家

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 管華,高更和;秦嶺-黃淮平原交界帶地貌演化階段的信息熵判定[J];地理科學(xué);2002年06期

2 黃，

本文編號(hào)：1362063