D-InSAR技術(shù)在盤錦地區(qū)地面沉降監(jiān)測中的應(yīng)用研究
發(fā)布時間：2018-08-31 11:55
【摘要】：地面沉降(Land subsidence)是由于自然因素和人為因素造成的地表垂直向變形現(xiàn)象。我國很多城市和地區(qū)都受到地面沉降的影響。地面沉降直接影響了社會穩(wěn)定和區(qū)域經(jīng)濟(jì)的持續(xù)發(fā)展。 合成孔徑雷達(dá)干涉差分測量(D-InSAR)技術(shù)是近幾年發(fā)展起來的新技術(shù)，，主要用于地面沉降、山體滑坡、冰川移動、火山活動、地震等地表微小形變的監(jiān)測。其精度可以達(dá)到厘米級。與GPS和水準(zhǔn)測量相比，D-InSAR技術(shù)具有覆蓋范圍大、監(jiān)測成本低、獲取數(shù)據(jù)快、監(jiān)測難以監(jiān)測的區(qū)域、監(jiān)測精度高的優(yōu)勢。 本文利用合成孔徑雷達(dá)差分干涉測量(D-InSAR)技術(shù)，選取2007-2011年的ALOS-PALSAR數(shù)據(jù)6幅（景），結(jié)合STRM DEM數(shù)據(jù)，通過影像配準(zhǔn)、干涉圖濾波、去平地效應(yīng)、相位解纏、去地形相位和地理編碼等技術(shù)流程，對盤錦地區(qū)的地面沉降開展了研究。 盤錦地區(qū)存在東郭葦廠（A）、歡喜嶺（B）、西八千鄉(xiāng)（C）、盤錦市（D）4個地面沉降區(qū)。其中東郭葦廠（A）沉降區(qū)面積4.22km2，橢圓形沉降區(qū)長軸方向為北東—南西向，2007-2011年累計沉降量為-746mm，平均沉降速率為228mm/a；歡喜嶺（B）沉降區(qū)形態(tài)近似圓形，面積0.94km2，2007-2011年累計沉降量為-263mm，平均沉降速率為86mm/a；西八千鄉(xiāng)（C）沉降區(qū)面積4.38km2，橢圓形沉降區(qū)長軸方向為北東—南西向，2007-2011年累計沉降量為-414mm，平均沉降速率為124mm/a；盤錦市（D）沉降區(qū)面積較小，多為點狀分布，2007-2011年累計沉降量為-70mm，平均沉降速率為23mm/a。 通過地面沉降的時間序列分析，東郭葦廠（A）沉降面積有增大的趨勢，但沉降速率有放緩的趨勢；歡喜嶺（B）和西八千鄉(xiāng)（C）沉降速率波狀起伏并有逐漸變緩趨勢，歡喜嶺（B）沉降面積逐漸變小，西八千鄉(xiāng)（C）沉降面積有增大趨勢；盤錦市（D）沉降速率波狀起伏。 采用枝切樹法和最小費用流法對相位圖解纏進(jìn)行了對比研究。第一種差分方法直接對干涉相位解纏，通過最小二乘法確定模擬地形相位的縮放因子，從而改進(jìn)模擬的地形相位。第二種差分方法不需要對干涉相位（不是差分相位）解纏，即使干涉相位不能成功解纏，也能計算出合理結(jié)果。兩種不同解纏方法得到的計算結(jié)果基本一致。在東郭葦廠（A）、歡喜嶺（B）、西八千鄉(xiāng)（C）和盤錦市（D）4個沉降區(qū)，用枝切樹法解纏得到的最大形變量分別為-176mm、-88mm、-99mm和-28mm，用最小費用流方法解纏得到的最大形變量分別為-169mm、-78mm、-105mm和-16mm，最小費用流方法解纏比枝切樹法解纏得到的計算結(jié)果普遍偏小。枝切樹解纏法適合平原地區(qū)解纏計算，且解纏速度較快；最小費用流法考慮全局最優(yōu)，適合山區(qū)和平原地區(qū)解纏。
[Abstract]:Land subsidence (Land subsidence) is a vertical deformation phenomenon caused by natural and human factors. Many cities and regions in China are affected by land subsidence. Land subsidence directly affects social stability and the sustainable development of regional economy. Synthetic Aperture Radar Interferometric differential Measurement (D-InSAR) is a new technique developed in recent years. It is mainly used in the monitoring of ground subsidence, landslide, glacier movement, volcanic activity, earthquake and so on. Its precision can reach centimeter level. Compared with GPS and leveling, D-InSAR technology has the advantages of wide coverage, low monitoring cost, fast data acquisition, difficult monitoring and high monitoring accuracy. In this paper, ALOS-PALSAR data from 2007-2011 are selected by using synthetic Aperture Radar differential Interferometry (D-InSAR) technique. Combined with STRM DEM data, image registration, interferogram filtering, levelling effect, phase unwrapping are used. The land subsidence in Panjin area is studied in the process of detopographic phase and geographic coding. In Panjin area, there are four ground subsidence areas in (A), Huanxiling of Dongguo Reed Plant, (C), Panjin City, (C), Xieqianxiang, (B),. The area of (A) settlement area in Dongguo Reed Plant is 4.22 km ~ 2, the long axis of elliptical settlement area is -746mm from 2007 to 2011, the average subsidence rate is 228mm / a, and the shape of Xiling (B) settlement area is approximately circular. The accumulative subsidence area of 0.94km2 / s in 2007-2011 is -263mm, the average subsidence rate is 86mm / a, the area of (C) subsidence area in Xibaqianxiang is 4.38km2, the long axis direction of elliptical subsidence zone is -414mm in 2007-2011, the average subsidence rate is 124mm / a; In Panjin City, the area of (D) subsidence area is small, and the accumulative subsidence amount is -70 mm from 2007 to 2011, and the average subsidence rate is 23 mm / a. Based on the time series analysis of land subsidence, the settlement area of (A) in Dongguo Reed Plant has a tendency to increase, but the settlement rate has a tendency to slow down, while the settling rate of (B) in Huanxiling and (C) in Xibaqianxiang fluctuates wave-like and gradually slows down. The settlement area of (B) in Huanxiling gradually becomes smaller, and the subsidence area of (C) in Xibaqianxiang has an increasing trend, while the settling rate of (D) in Panjin fluctuates in waves. The twisted-cut tree method and the least cost flow method are used to study the phase diagram wrapping. The first difference method unwraps the interferometric phase directly and determines the scaling factor of the simulated terrain phase by the least square method so as to improve the terrain phase of the simulation. The second method does not need to unwrap the interference phase (not the differential phase), even if the interference phase can not be unwrapped successfully, the reasonable results can be calculated. The results obtained by two different unwrapping methods are basically consistent. In the four subsidence areas of (A), Huanxiling (B), Xibaqianxiang (C) and Panjin (D) in Dongguo Reed Factory, The maximum shape variables obtained by twisted-tangential tree method are -176mm-88mm-99mm and -28mm, respectively, and the maximum shape variables by the least cost flow method are -169mm / -78mm / -105mm and -16mm respectively. The results obtained by the least cost flow method are generally smaller than those obtained by the twisted-tangent tree method. The branch cutting tree unwrapping method is suitable for the calculation of unwrapping in plain area, and the minimum cost flow method is suitable for the global optimization, and is suitable for the unwrapping in mountainous and plain areas.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P642.26
本文編號：2214910
[Abstract]:Land subsidence (Land subsidence) is a vertical deformation phenomenon caused by natural and human factors. Many cities and regions in China are affected by land subsidence. Land subsidence directly affects social stability and the sustainable development of regional economy. Synthetic Aperture Radar Interferometric differential Measurement (D-InSAR) is a new technique developed in recent years. It is mainly used in the monitoring of ground subsidence, landslide, glacier movement, volcanic activity, earthquake and so on. Its precision can reach centimeter level. Compared with GPS and leveling, D-InSAR technology has the advantages of wide coverage, low monitoring cost, fast data acquisition, difficult monitoring and high monitoring accuracy. In this paper, ALOS-PALSAR data from 2007-2011 are selected by using synthetic Aperture Radar differential Interferometry (D-InSAR) technique. Combined with STRM DEM data, image registration, interferogram filtering, levelling effect, phase unwrapping are used. The land subsidence in Panjin area is studied in the process of detopographic phase and geographic coding. In Panjin area, there are four ground subsidence areas in (A), Huanxiling of Dongguo Reed Plant, (C), Panjin City, (C), Xieqianxiang, (B),. The area of (A) settlement area in Dongguo Reed Plant is 4.22 km ~ 2, the long axis of elliptical settlement area is -746mm from 2007 to 2011, the average subsidence rate is 228mm / a, and the shape of Xiling (B) settlement area is approximately circular. The accumulative subsidence area of 0.94km2 / s in 2007-2011 is -263mm, the average subsidence rate is 86mm / a, the area of (C) subsidence area in Xibaqianxiang is 4.38km2, the long axis direction of elliptical subsidence zone is -414mm in 2007-2011, the average subsidence rate is 124mm / a; In Panjin City, the area of (D) subsidence area is small, and the accumulative subsidence amount is -70 mm from 2007 to 2011, and the average subsidence rate is 23 mm / a. Based on the time series analysis of land subsidence, the settlement area of (A) in Dongguo Reed Plant has a tendency to increase, but the settlement rate has a tendency to slow down, while the settling rate of (B) in Huanxiling and (C) in Xibaqianxiang fluctuates wave-like and gradually slows down. The settlement area of (B) in Huanxiling gradually becomes smaller, and the subsidence area of (C) in Xibaqianxiang has an increasing trend, while the settling rate of (D) in Panjin fluctuates in waves. The twisted-cut tree method and the least cost flow method are used to study the phase diagram wrapping. The first difference method unwraps the interferometric phase directly and determines the scaling factor of the simulated terrain phase by the least square method so as to improve the terrain phase of the simulation. The second method does not need to unwrap the interference phase (not the differential phase), even if the interference phase can not be unwrapped successfully, the reasonable results can be calculated. The results obtained by two different unwrapping methods are basically consistent. In the four subsidence areas of (A), Huanxiling (B), Xibaqianxiang (C) and Panjin (D) in Dongguo Reed Factory, The maximum shape variables obtained by twisted-tangential tree method are -176mm-88mm-99mm and -28mm, respectively, and the maximum shape variables by the least cost flow method are -169mm / -78mm / -105mm and -16mm respectively. The results obtained by the least cost flow method are generally smaller than those obtained by the twisted-tangent tree method. The branch cutting tree unwrapping method is suitable for the calculation of unwrapping in plain area, and the minimum cost flow method is suitable for the global optimization, and is suitable for the unwrapping in mountainous and plain areas.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P642.26
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