South African Geographical Journal ( IF 1.662 ) Pub Date : 2021-08-25 , DOI: 10.1080/03736245.2021.1967774 S.E. Maswanganye 1 , T. Dube 1 , D. Mazvimavi 1 , N. Jovanovic 1
ABSTRACT
Non-perennial rivers (NPRs) account for more than 50% of the world’s river network and their occurrence is expanding. Some rivers that were previously classified as perennial have evolved to be NPRs in response to climate change and socio-economic uses. There is inadequate understanding of the spatio-temporal dynamics of flows and pools along these rivers due to lack of data, as a priority of river monitoring has been placed on perennial rivers. The current understanding and methods used for monitoring NPRs are mostly derived from perennial rivers perspective. This review paper examines challenges for collecting data on these hydrological attributes of NPRs using current methods. Furthermore, this paper provides an overview of the potential and limitations of using remote sensing data for monitoring NPRs. Remote sensing data are successfully used for monitoring wetlands and lakes, but little is known about their capabilities for monitoring pools along NPRs. Remote sensing has also been successfully used to estimate discharge of large perennial rivers; however, this has not been fully explored for NPRs. Remote sensing has the potential to extract more hydrological information that currently cannot be extracted using conventional in-situ measurement methods. With advancements, remote sensing technology could become useful for managing NPRs.
中文翻译:
遥感应用监测沿非常年河流的水池和水流时空动态:综述
摘要
非常年河流(NPRs)占世界河网的 50% 以上,并且它们的出现正在扩大。一些以前被归类为常年河流的河流已经演变为 NPR,以应对气候变化和社会经济用途。由于缺乏数据,人们对沿这些河流的流量和水池的时空动态了解不足,因为河流监测的优先事项已放在常年河流上。目前用于监测 NPR 的认识和方法大多来自常年河流的观点。本综述文章探讨了使用当前方法收集 NPR 的这些水文属性数据的挑战。此外,本文概述了使用遥感数据监测 NPR 的潜力和局限性。遥感数据已成功用于监测湿地和湖泊,但对其监测 NPR 沿线水池的能力知之甚少。遥感也已成功地用于估算大型常年河流的流量;但是,对于 NPR,这还没有得到充分探索。遥感有可能提取更多目前无法使用常规现场测量方法提取的水文信息。随着进步,遥感技术可能对管理 NPR 有用。遥感有可能提取更多目前无法使用常规现场测量方法提取的水文信息。随着进步,遥感技术可能对管理 NPR 有用。遥感有可能提取更多目前无法使用常规现场测量方法提取的水文信息。随着进步,遥感技术可能对管理 NPR 有用。