本文選題：小基線干涉測量 + 標(biāo)準(zhǔn)差橢圓�。� 參考：《地球信息科學(xué)學(xué)報(bào)》2017年02期

【摘要】：20世紀(jì)60年代以來,北京市地面沉降不斷發(fā)展,目前已經(jīng)形成了東郊八里莊-大郊亭、東北郊-來廣營、昌平沙河-八仙莊、大興榆垡-禮賢和順義平各莊5個(gè)沉降區(qū)。本文選取目前地面沉降較為嚴(yán)重的北京市朝陽區(qū)、順義區(qū)和通州區(qū)作為研究區(qū),利用2003-2010年的47景ASAR影像數(shù)據(jù),采用SBAS-InSAR技術(shù)獲取了研究區(qū)的地面沉降監(jiān)測結(jié)果,并分別以SFP點(diǎn)年均沉降速率和各年沉降量作為權(quán)重,計(jì)算SFP點(diǎn)空間分布中心與方向特征橢圓,定量分析了研究區(qū)地面沉降時(shí)空特征。結(jié)果表明:2004-2010年,北京市地面沉降表現(xiàn)為嚴(yán)重的不均勻沉降,年沉降量最大值由104.04 mm增加到178.83 mm;標(biāo)準(zhǔn)差橢圓長軸與南北方向平行,反映出地面沉降空間發(fā)展方向性在南北方向較東西方向明顯,橢圓面積由592.25 km~2減小到503.84 km~2,表明2004-2010年研究區(qū)內(nèi)發(fā)生地面沉降的區(qū)域范圍變化呈減小趨勢,但從沉降量可以發(fā)現(xiàn),北京地面沉降一直處于加重趨勢。
[Abstract]:Since the 1960s, the land subsidence in Beijing has been developing continuously, and now it has formed five settlement areas in the eastern suburb of Balizhuang-Dazuting, the northeast suburb of Laiguanying, the Shahe-Baxianzhuang of Changping, the Daxing Fai-Lixian and the Shunyi Pingzhuang. In this paper, we select Chaoyang District, Shunyi District and Tongzhou District, which have serious ground subsidence at present, as research areas, and use 47 ASAR images from 2003 to 2010 to obtain the monitoring results of land subsidence in the study area by using SBAS-InSAR technology. The spatial distribution center and directional characteristic ellipse of SFP point are calculated by taking the average annual settlement rate and the annual settlement amount as weights, respectively, and the space-time characteristics of land subsidence in the study area are quantitatively analyzed. The results show that the ground subsidence in Beijing was seriously uneven from 2004 to 2010, the maximum annual settlement increased from 104.04 mm to 178.83 mm, and the standard deviation elliptical long axis was parallel to the north and south directions. It shows that the direction of land subsidence spatial development is more obvious in the north and south direction than in the east and west direction, and the elliptical area is reduced from 592.25 km~2 to 503.84 km2, indicating that the variation of the range of the land subsidence in the study area from 2004 to 2010 shows a decreasing trend, but it can be found from the settlement amount. Beijing land subsidence has been in an aggravating trend.
【作者單位】： 三維信息獲取與應(yīng)用教育部重點(diǎn)實(shí)驗(yàn)室;城市環(huán)境過程與數(shù)字模擬國家重點(diǎn)實(shí)驗(yàn)室培育基地;首都師范大學(xué)資源環(huán)境與旅游學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(4140010982);國家自然科學(xué)基金重點(diǎn)項(xiàng)目(41130744);國家自然科學(xué)基金面上項(xiàng)目(41171335) 北京市教育委員會(huì)科技計(jì)劃面上項(xiàng)目“淺地表空間利用差異模式下的地面沉降演化特征”
【分類號(hào)】：P642.26
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本文編號(hào)：1786403