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    Abstract

    This document presents a description of the Santa Maria dataset. It includes a short description of the area were the observations and soil samples were produced, including the procedures for soil sampling and description. The analytical methods are described thoroughly. The reader should be aware of the fact that soil science evolved in Brazil following a somewhat different pathway than in the countries of the northern hemisphere due to the specific features of tropical soils. Methods have been adapted along the years, possibly leading to nomenclature mismatches. This document is in process of translation from Portuguese to English. This document is a draft version.

    \label{sec:intro}Introduction

    The objective of this document is to present a detailed description of the Santa Maria dataset. It includes a short description of the area were the observations and soil samples were produced, including the procedures for soil sampling and description. The analytical methods are described thoroughly.

    \label{sec:description}Description of the study area

    The catchment area of the DNOS/CORSAN reservoir is located in the southern border of the plateau of the Paraná Sedimentary Basin, in the city of Santa Maria, state of Rio Grande do Sul, Brazil (Figure \ref{fig:location}). The Santa Maria dataset covers the northern sector of this catchment area – an area of \(\approx\)2000 ha, which corresponds to about 60% of the entire catchment area.

    The Coordinate Reference System (CRS) adopted is defined by the WGS1984 datum with coordinates in degrees. When using the Universal Transverse of Mercator (UTM), the parameters are zone 22S, WGS1984 datum, central meridian 51, with the coordinates in metres.