Assessment of the feasibility of utilizing Landsat for detection and monitoring of landfills in a statewide GIS     

E. Johnson  M. Klein  K. Mickus 《Environmental Geology》1993,22(2):129-140

Use of satellite data could be beneficial and cost effective in detecting and monitoring landfills in a state-wide geographic information system (GIS). To assure the feasibility of this approach, multitemporal Landsat data were used to detect several selected active and inactive landfills in central and southwest Missouri. The landfills were visually delineated from aerial photography of approximately the same two dates. A classification procedure based on homogeneity of the digital numbers was performed on each landfill scene for each time period using four spectral bands: two visible, one near-infrared, and one mid-infrared. The mid-infrared band proved more useful in delineating landfills, especially when spectral change was compared to the near-infrared band. The active landfills were spectrally different from surrounding land cover as were the two landfills which closed after the collection of the first Landsat scene. These landfills showed considerable areal change between the two selected time periods as verified by the aerial photographs. The inactive landfills were more difficult to discern from surrounding land cover types because they were grass covered and spectrally similar to pasture. Consequently, areal change could not be assigned to these older landfills because the reclamation process was practically complete.  相似文献   

用Landsat TM订正NOAA／AVHRR监测洪涝精度方法研究     

纪瑞鹏  张淑杰  班显秀  陈鹏狮 《气象科技》2004,32(1):60-62

为了提高NOAA卫星监测洪涝灾害精度，分别对NOAA和TM卫星资料监测洪涝灾害的光学原理进行阐述，并以黑山县和台安县为例，利用Landsat TM资料空间分辨率高的特点，对NOAA／AVHRR资料监测洪涝精度进行订正分析，平均相对误差为4．4％。研究结果表明，利用TM对NOAA监测洪涝精度进行订正是提高NOAA卫星监测洪涝精度可行的有效方法。  相似文献   

The coastal erosion and evolution of the Yellow River Delta abandoned lobe     

LI Anlong  LI Guangxue  CAO Lihua  ZHANG Qingde  DENG Shenggui 《地理学报》2004,14(4):465-472

A statistic analysis predicting coastal change of the Yellow River abandoned delta lobe formed from 1964 to 1976 using Landsat TM imagery was conducted by calculating the coastal erosion/accumulation rates obtained from four different classic profiles and plotting the change curves of coastline with time. The studies showed that the regularity of the evolution of the coastline was very obvious after the delta lobe was abandoned. The coastal evolution can be divided into three different phases: erosion phase, transition phase and cyclical change phase. At present, the coast has evolved to the cyclical change phase. The natural coastline change cycle is 4 years between the dam and is 5 years to the west of the dam. In the cyclical change phase, the quasi-equilibrium line of the coast was located near the coastline of 1996, the current coast may recede 1.79 km to reach the natural equilibrium coastline. Therefore, some measures must be taken to protect the dam or the dam will be destroyed by the force of nature. The curves also revealed the magnitude of erosion/accumulation rates would decrease gradually with time. The results of the study offer guidance for coast protection, and proves that the evolution of silty coast actually was a cyclical change process too.  相似文献   

Landsat 7图像快速几何校正方法研究   总被引：2，自引：0，他引：2  

唐海蓉  吴一戎  向茂生  朱敏慧 《遥感学报》2005,9(1):57-63

Landsat 7采用双向扫描的方式，由于扫描非线性及卫星姿态和轨道的波动，使得建立卫星视线的计算量增大。引入一种求视线的快速方法，将图像上的扭曲分解为标称扫描镜及卫星运动引起的和7个偏离标称运动的微扰量引起的两个部分，详细分析了各个微扰量造成的影响，建立了一个新的视线求解方程。最后用实际的数据验证了方法的速度和精度。  相似文献   

Mapping Supergene／Hypogene Alteration Signatures with Landsat ETM＋ Data. Paishanlou Gold Mine, Liaoning Province, China     

MalogoJMKongola WangEnde 《中国地质大学学报(英文版)》2005,16(1):38-44

INTRODUCTIONInterpretation of Boxworks and Leached OutcropsSupergene alteration (or weathering), of sulfidesystems yields many products, which, if exposed atthe earth's surface, allow some interpretation of orig inal minerals present, which in turn, provide insightsinto the ore deposit at depth (Blanchard, 2003; Lillesand Kiefer, 2000; Anderson, 1982). These super gene products include secondary ore minerals, box works and other textures; various oxides, hydrox ides, …  相似文献   

基于Landsat TM数据的北京城市热岛研究   总被引：21，自引：1，他引：21  

江樟焰  陈云浩  李京 《武汉大学学报(信息科学版)》2006,31(2):120-123

利用Landsat TM热红外波段数据，根据辐射传输方程反演得到北京地区地表温度，讨论了北京城市热岛现象及其与土地覆盖类型和植被指数的关系。结果显示，北京城区地表温度明显比郊区地表温度高。通过地表温度对比分析发现，城区平均地表温度比近郊区和远郊区地表温度分别高出4．5℃和9℃，城市热岛效应明显。城区不同地表覆盖类型的地表温度也有显著差异，城市地表温度与NDVI具有明显的负相关关系，城市地表植被覆盖度低是城市热岛出现的主要原因。  相似文献   

利用TM遥感影像分析准噶尔盆地西南缘新构造运动与油气藏形成的关系     

傅碧宏  Ohnuma T.  侯建勇 《国土资源遥感》1997,8(1):7-13

本文以覆盖准噶尔盆地西南缘的四景LandsatTM卫星遥感影像的地质解译为基础,结合野外实地地质考察所获取的地质资料以及盆地烃源岩的生烃、排烃模拟结果,对该区第二、三排构造带自上新世以来的新构造运动变形特征,背斜和断裂构造的形成时代以及新构造运动与油气藏的关系进行了综合分析。研究结果表明,该区第二、三排构造带的新构造运动变形非常强烈,发育于这二排构造带上的背斜构造和断裂构造的构造变形始于上新世末期,早更新世末期是新构造变形最强烈的时期,第二、三排背斜构造带在中更新世早期已基本形成。有利烃源岩---安集海河组的排烃高峰晚于背斜构造形成时期,其生成的油气很有可能聚集于这些背斜构造中。发育于背斜构造核部或北翼一侧的逆冲断裂构造,一方面为油气垂向运移提供良好的通道,另一方面也破坏了油气构造,为油气的逸散创造了条件。  相似文献   

Distribution of thermal areas on an active lava flow field: Landsat observations of Kilauea,Hawaii, July 1991     

Luke P. Flynn  Peter J. Mouginis-Mark  Keith A. Horton 《Bulletin of Volcanology》1994,56(4):284-296

A Landsat Thematic Mapper (TM) image acquired on 23 July 1991 recorded widespread activity associated with the Episode 48 of the Pu'u 'O'o-Kupaianaha eruption of Kilauea Volcano, Hawaii. The scene contains a very large number (>3500) of thermally elevated near infrared (0.8–2.35 m) pixels (each 900 m²), which enable the spatial distribution of volcanic activity to be identified. This activity includes a lava lake within Pu'u 'O'o cone, an active lava tube system (7.9 km in length) with skylights between the Kupaianaha lava shield and several ocean entry points, and extensive active surface flows (total area of 1.3 km²) within a much larger area of cooling flows (total16 km²). The production of an average flux density map from the TM data of the flow field, wherein the average flux density is defined in units of Wm^-2, allows for the chronology of emplacement of active and cooling flows to be determined. The flux density map reveals that there were at least three breakouts (>5000 Wm^-2) feeding active flows, but on the day that the data were collected the TM recorded a waning phase of surface activity in this area, based on the relatively large amount of intermediate power-emitting (cooling) flows compared to high power-emitting (active) flows. The production of a comparable flux density map for future eruptions would aid in the assessment of volcanic hazards if the data were available in near-real time.  相似文献   

Improved Geological Interpretation Using Landsat TM Data in Lancang-Jinghong Area, Yunnan Province, China     

BassamFAIBassam 《中国地质大学学报(英文版)》2003,14(1):52-58

Landsat TM digital spectral data of Lancang-Jinghong area (Yunnan Province) has been used for the purpose of geological interpretation. To meet this object, different image processing tech-niques including selected band color composites, principal component analysis and IHS decorrelation stretching are used to improve the discrimination of different lithologicai and structural features in the area. It was found that IHS decorrelation stretching images obtained from the transformation of false color composite 741 (in red, green and blue) provided the best results based on the original data. By combining the characteristics of images produced by different approaches and other canonically trans-formed images with available geological data and surface observations, the geological interpretation could be done with satisfactory degree of accuracy.  相似文献   

Features of the long-term transformation of the Krasnodar reservoir,near the mouth of the Kuban River,Russia     

POGORELOV Anatoly  LAGUTA Andrey  KISELEV Evgeny  LIPILIN Dmitry 《地理学报(英文版)》2021,31(12):1895-1904

The article considers the long-term(1941–2018) transformation of the Krasnodar valley reservoir, the largest in the North Caucasus. The main functions of the Krasnodar reservoir are irrigation of rice systems and flood protection of land in the Krasnodar reservoir region and the Republic of Adygea. According to topographic maps, Landsat satellite images(1974–2018) and field observations(2016–2018), four stages of transformation of the floodplain reservoir are identified. The selected stages are characterized by both natural causes(the transformation of the filling deltas into the extended deltas, etc.) and man-made causes(runoff diversions in the delta areas, etc.). The key factor of transformation is the formation of deltas of rivers flowing into the reservoir. Each of the selected stages, against the background of a gradual reduction in the area and volume of the reservoir, is characterized by the peculiarities of the formation of river deltas with the formation of genetically homogeneous sections of delta regions. During the period of operation of the reservoir, the delta of the main Kuban River moved up to 32.4 km and took away an area of 35.4 km~2 of the reservoir. During the formation of the deltas of the Kuban and Belaya rivers, a bridge was formed on the Krasnodar reservoir. The evolution of the delta regions led to the division of the reservoir into two autonomous reservoirs. The total area of the delta regions was 85.9 km~2 by 2018, i.e., 21% of the initial area of the reservoir. The transformation of the Krasnodar reservoir leads to a decrease in its regulated volume and gradual degradation.  相似文献