Application of Satellite Imagery and Water Indices to the Hydrography of the Cetina RiverBasin (Middle Adriatic)

Tea Duplančić Leder,Nenad Leder,Martina Baučić

doi:10.7225/toms.v09.n02.020

Tea Duplančić Leder, Nenad Leder + Show 1 more

Open Access

https://doi.org/10.7225/toms.v09.n02.020

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Abstract

The paper gives a brief description of the remote sensing method used for the identification and extraction of water surfaces. Landsat 8 and Sentinel 2 satellite imagery was used to separate land from bodies of water in the complex karst area surrounding the Croatian Cetina River, flowing into the Adriatic Sea. Water indexing methods are presented in detail. The most frequently used water indices were selected: NDWI, MNDWI, AWEI_nsh, AWEI_sh, WRI and LSWI, and their results compared. The combination of satellite imagery and calculated water indices is concluded to be very useful for the identification and mapping of the area and banks of lakes, riverine zones, river mouths and the coastline in the coastal zone. Landsat 8 satellite imagery is slightly inferior to Sentinel 2 due to lower image resolution. The best results were obtained with the NDWI water index and the worst with LSWI.

Highlights

Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defense, scientific research, and environmental protection (International Hydrographic Organization, 2020)
The main goal of this paper is to evaluate the potential of the application of satellite remote sensing and water indices to differentiate land from bodies of water in the karst area of the Cetina River, with special emphasis on the area of Cetina River inflow into the sea
Values of water indices for the area examined were calculated and are shown more extensively in two sample areas: (1) the northern part of Peruća Lake (Figure 4) and (2) the mouth of the Cetina River, where the river flows into the sea

Summary

Introduction

Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defense, scientific research, and environmental protection (International Hydrographic Organization, 2020). Hydrography underpins many other activities associated with bodies of water, including coastal zone management and marine science. A variety of factors cause changes in bodies of water, including climate change that has resulted in drought, erosion, floods and various types of water pollution. The method is used in water resource assessment, hydrography, coastal zone management and environmental impact studies

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