ESTIMATION Of SUSPENDED SEDIMENT CONCENTRATION USING VNREDSAT – 1A MULTISPECTRAL DATA, A CASE STUDY IN RED RIVER, HANOI, VIETNAM

Abstract

The traditional methods for measuring water quality variables are timeconsuming and do not give a synoptic view of a water body or, more significantly, a synoptic view of different water bodies across the landscape. However, remote sensing technology with advantages such as wide area coverage and short revisit interval have been effectively used for environmental pollution applications, such as for monitoring water quality parameters. Many studies around the world show that optical satellite imagery can be used effectively in evaluating suspended sediment concentration. This article presents results of monitoring suspended sediment concentration in Red River, Hanoi, Vietnam through ground truth measurements and VNREDSat-1A multispectral data. The results obtained in the study can be used to serve the management, monitoring and evaluation of surface water quality.kEY wORDS: remote sensing, multispectral image, suspended sediment, surface water quality, VNREDSat-1A CITATION:

North to South Variations in the Suspended Sediment Transport Budget within Large Siberian River Deltas Revealed by Remote Sensing Data

“…Sediment concentration is mainly estimated using the red [36][37][38] (and near-infrared) bands; the green band [39] is used rarely, and panchromatic images are considered only at single cases. In general, the red band reflectances have the most robust correlations with SSC over the range of values.…”

“…Our approach used in this study relies on regression relationships between SSC and either raw pixel values of satellite images, so called DN-digital numbers, which depend on the remote sensing system, satellite sensor parameters, and approach only one remote sensing system [39][40][41], or reflectance coefficients (absolute units, ρ). The latter is independent from the remote sensing instrument and sensing parameters [36,42,43].…”

“…The obtained models (Table 2) were compared to each other and to the ones reported for other river systems of the large rivers of the World [22,23,38,39,52]. Different relationships between SSC and ρ are explained by differences in sediment properties, mainly grain size.…”

Analisis Dinamika Tingkat Kekeruhan Dan Kedalaman Relatif Perairan Di Waduk Sutami Kabupaten Malang

“…Permasalahan sedimentasi merupakan masalah yang sangat penting untuk segera ditangani di suatu waduk [9]. Sedimentasi dapat mengurangi kapasitas tampungan suatu waduk [10], [11] dan memengaruhi kondisi kualitas air [12], [13]. Sedimentasi mempunyai hubungan dengan tingkat kekeruhan dan kedalaman perairan [14], [15].…”

“…Teknologi ini harus dapat diandalkan untuk identifikasi dan monitoring pada area perairan yang luas seperti waduk Sutami. Penginderaan Jauh merupakan salah satu teknologi yang dapat dimanfaatkan untuk kegiatan pengukuran dan monitoring proses sedimentasi pada daerah yang memiliki cakupan luas [13], [22], [23]. Penginderaan jauh memiliki keunggulan yaitu proses perolehan data spasial yang cukup luas dalam waktu yang relatif singkat [24], [25].…”