SYHDA – System of Hydrological Data Acquisition and Analysis

Abstract

Acquisition and analysis of hydrological series are essential activities for hydrological studies in watersheds. However, they require time and are usually complex and susceptible to human errors. In order to minimize these problems, computational tools are often used for hydrological analysis, although there are few of them in Brazil. This technical note aims to provide a structured document with information on the motivation, development, conception, main functionalities, and applications of the System of Hydrological Data Acquisition and Analysis (SYHDA). SYHDA is a software intended for acquisition and analysis of hydrological data (rainfall and streamflow) and was fully idealized to enable the user to deal with the country’s leading hydrology databases. It has several modules that include analysis by descriptive statistics and graphical tools, seasonality analysis of streamflows, non-parametric tests, and at-site and regional probabilistic modeling. SYHDA has been used in numerous scientific studies, which give grounds to affirm that it demonstrates a great potential to be used in both everyday and complex activities demanded by the scientific and technical community of hydrology and related areas.

Tendência e variabilidade da chuva no Rio Grande do Sul, Brasil

“…Thus, the hydrological data was processed using the System of Hydrological Data Acquisition and Analysis (SYHDA) (VARGAS et al 2019), and from the processing of 554 rain gauges series, 271 series of ATR, MTR, and AMDR were obtained, with extension between 20 and 73 years (Figure 2).…”

A Modeling Approach for Analyzing the Hydrological Impacts of the Agribusiness Land-Use Scenarios in an Amazon Basin

“…We established a limit of 31 days for missing data in the annual streamflow series, and gaps in the meteorological data were filled using regressions between the rain gauges. Data quality control was conducted using the System of Hydrological Data Acquisition and Analysis (SHYDA) [25].…”

“…The physical attributes of the soils and vegetation parameters were based on the literature and are presented in Table 1. Native forest (Amazon) 0.13-0.18 [24] 10 [14] 6.25 [24] 140 [25] 2000 [9] Undergrowth 0.2-0.25 [25] 0.5 [26] 0.5 [11] 65 [26] 500 [ In addition, the following datasets are also required for the streamflow-routing module: (i) the length of the channels, (ii) the channels' slope, (iii) the channels' width, and (iv) which sub-basins drain into each watercourse. These data were computed in ArcGIS 10.5 GIS environment [29].…”