Derived from Landsat imagery and capable of enhancing the contrast between surface water bodies background, indices are widely used in body extraction. Whether one index its optimal threshold can maintain best all year round is a question. At present, however, little research has considered effect time or conducted experiments with data different months. To identify for extraction, two regions ...

Mapping surface water distribution and its dynamics over various environments with robust methods is essential for managing resources supporting water-related policy design. Thresholding Single Water Index image (TSWI) threshold a common way of using index (WI) mapping it easy to use could obtain acceptable accuracies in many applications. As more WIs are available each has distinct merits, the...

Earth observation data have proven to be a valuable resource of quantitative information that is more consistent in time and space than traditional land-based surveys. Remote sensing plays vital role collecting many aspects life, whether scientific, economic, or political. Land cover very important supporting urban planning decision making provides opportunities for mapping monitoring areas. Mu...

半干旱内陆地区的湖泊湿地是一种特殊的生态系统,季节和年际时间尺度上的湖泊水文变化对湖泊湿地生态结构和功能有着重要影响.近20年来,月亮泡湖泊湿地经历了自然和人为因素共同作用下的水文波动过程.为了实现大尺度地表生态年内/年际变化检测,更好地了解湖泊年际水淹范围及其水淹频次对内陆湖滨湿地生态的影响,基于1994—2018年Landsat TM/OLI影像数据(30 m),首先,计算提取月亮泡的年际水体信息和水淹频次,进而获取湖泊年际淹没范围.其次,采用综合生态指数变化检测法提取生态信息,选取3个标准观测年(1995、2006、2016年),从年内变化和年际变化视角分级评价了研究区生态变化,并分析了水淹频次与湿地生态变化的关系.最终,现有研究表明:湖泊年际水淹区主要分布在月亮泡的北侧与西侧尾闾,月亮泡湖泊湿地北侧的年际水淹频次更为显著.湖泊面积的扩展与自然湿地的减少是月亮泡水淹区域的主要变...

ABSTRACTNusa Dua Beach, Bali, is morphologically dynamic because it constantly changing due to erosion and accretion. In 2003, the efforts were made develop groins, where this one of solutions overcome erosion. Analysis shoreline changes needs be carried out see effectiveness groin development by looking at before after construction using Landsat imagery data for 26 years. This research method ...

The paper assesses trends in use of earth observation data wetland conditions monitoring and assessment Zimbabwe from 1980 to 2019. Reviewed literature shows academia research institutions (69.8%), government agencies (14%) international development partners (16.3%) as the main users remotely sensed ecological assessments monitoring. There is more reliance by abovementioned stakeholders on free...