本文選題：黃河 + 遙感�。� 參考：《水利學(xué)報(bào)》2017年03期

【摘要】：什四份子彎道因其特殊的河道形態(tài)及地理位置而成為黃河內(nèi)蒙古段易發(fā)生冰塞斷面。通過對(duì)2014—2015年冬季該段野外冰情監(jiān)測(cè)及水文、氣象資料分析,結(jié)合Landsat8遙感影像數(shù)據(jù)解譯,研究了什四份子彎道河冰生消及冰塞形成過程。結(jié)果表明,野外觀測(cè)結(jié)合遙感影像解譯能夠準(zhǔn)確地反映河冰的時(shí)空特性。該河段彎道凹岸處沖積岸冰及凸岸靜態(tài)岸冰的生長(zhǎng),極大地束窄了河面寬度,降低了水流的輸冰能力,而使其成為初始卡冰位置;冰蓋至此向上游發(fā)展,彎道下游因來冰量減少和上下游水力坡度增大而形成清溝;受彎道徑向水流方向改變及彎道螺旋流的影響,導(dǎo)致冰花在冰蓋下主槽與灘地的交界處堆積;穩(wěn)封期受氣溫升降變化使得冰蓋表面凍融交替,沖積冰反射率增大,后期解譯的遙感影像中平滑岸冰面積較初始封河期增加。
[Abstract]:Due to its special channel shape and geographical location, Shijiaodong bend is prone to ice slug section in Inner Mongolia section of Yellow River. Based on the field ice monitoring, hydrological and meteorological data analysis, and Landsat8 remote sensing image data interpretation, the ice formation and formation process of the Shishijiaodao River are studied in this paper. The results show that field observation combined with remote sensing image interpretation can accurately reflect the temporal and spatial characteristics of river ice. The growth of alluvial and static bank ice at the concave bank of the bend of the river has greatly reduced the width of the river surface, reduced the ice transport capacity of the current, and made it become the initial ice holding position, and the ice cap has developed upstream. Due to the decrease of the amount of ice coming from the lower reaches of the bend and the increase of the hydraulic gradient of the upper and lower reaches, the trench clearance is formed, which is influenced by the change of the radial flow direction of the bend and the spiral flow of the bend, resulting in the accumulation of ice flowers at the junction between the main channel and the beach under the ice cover. The ice cover surface freeze-thaw alternately during the stable sealing period and the ice reflectivity of alluvial ice increases, and the smooth shore ice area in the remote sensing images interpreted in the later stage is increased compared with the initial river closure period.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)水利與土木建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51369017、51369021) 內(nèi)蒙古自治區(qū)自然基金項(xiàng)目(2012MS0721)
【分類號(hào)】：TV875

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