Curve Number Applications for Restoration the Zarqa River Basin

AbstractSǎrǎţel River basin, which is located in Curvature Subcarpahian area, has been facing an obvious increase in frequency of hydrological risk phenomena, associated with torrential events, during the last years. This trend is highly related to the increase in frequency of the extreme climatic phenomena and to the land use changes. The present study is aimed to highlight the spatial and quantitative changes occurred in surface runoff depth in Sǎrǎţel catchment, between 1990–2006. This purpose was reached by estimating the surface runoff depth assignable to the average annual rainfall, by means of SCS-CN method, which was integrated into the GIS environment through the ArcCN-Runoff extension, for ArcGIS 10.1. In order to compute the surface runoff depth, by CN method, the land cover and the hydrological soil classes were introduced as vector (polygon data), while the curve number and the average annual rainfall were introduced as tables. After spatially modeling the surface runoff depth for the two years, the 1990 raster dataset was subtracted from the 2006 raster dataset, in order to highlight the changes in surface runoff depth.

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Determination of potential retention of the Fryšávka River basin

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201058050263 ◽

2010 ◽

Vol 58 (5) ◽

pp. 263-270 ◽

Cited By ~ 1

Author(s):

Tomáš Mašíček ◽

František Toman

Keyword(s):

River Basin ◽

Flood Control ◽

Water Retention ◽

Curve Number ◽

Control Measures ◽

Design Parameters ◽

Software Products ◽

Software Applications ◽

Integrated Software

Hydrological models provide design parameters for the design of flood control measures. Runoff from the river basin is primarily determined by the amount of rainfall and water retention of the river basin. The Fryšávka River basin was chosen to determine the potential water retention of the river basin. Before the determination of potential retention preparatory work was carried out: description of the current state of land cover based on a detailed field survey, the representation of hydrological soil groups in the basin found in BPEJ (Bonitované půdně ekologické jednotky – Valuated land–ecological units) maps, delimitation of basin parts by the digital vector layer ZABAGED altimetry (Základní báze geografických dat – Fundamental base of geographic data) – 3D contour and evaluation of basin parts by the runoff curve numbers (CN). The processing of background data was performed by the program ArcGIS 9.2 of ArcView software products using a set of integrated software applications ArcMap, ArcCatalog and ArcToolbox. To assess the potential retention, as part of the hydrologic characteristics of the Fryšávka River basin, the curve number method, a modification of the deterministic episode model DesQ–MAXQ, was used. The average numbers of runoff curves and the data about potential retention of river basin parts are presented in the form of map outputs.

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Predicted Changes in Short-Term Rainfall Intensities and Runoff at the Ipoltica River Basin

Pollack Periodica ◽

10.1556/606.2020.15.3.17 ◽

2020 ◽

Vol 15 (3) ◽

pp. 172-183

Author(s):

Gabriel Földes ◽

Silvia Kohnová ◽

Marija Mihaela Labat ◽

Kamila Hlavčová

Keyword(s):

Climate Change ◽

River Basin ◽

Climate Model ◽

Regional Climate ◽

Curve Number ◽

Short Term ◽

Community Land Model ◽

Design Values ◽

Service Curve ◽

The Impact

The paper focuses on the impact of climate change on runoff in the Ipoltica River basin in northern Slovakia. The analysis is divided into two parts: the first part contains an analysis of predicted changes in short-term rainfall intensities at the Liptovská Teplička climatological station; the second part is focused on the impact of runoff on a small mountainous river basin. The predicted short-term rainfall intensities were analyzed using the Community Land Model, which is a Regional Climate Model. The analysis was performed in durations of 60 to 1440 minutes for a warm period. The focus was aimed at comparing changes in rainfall characteristics, especially changes in seasonality, the scaling exponents, and design values. The second part focuses on the impact of changes in short-term rainfall on changes in runoff. The estimation of predicted runoff changes was provided for the period 2070 - 2100. These results were compared with the results from actual observations. The design floods were calculated using the Soil Conservation Service - Curve Number method. The results show that the runoff will be affected by climate change. Hence, it is important to reevaluate the land use management and practices at the Ipoltica River basin.

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Effects of Land Use Changes on Streamflow and Sediment Yield in Atibaia River Basin—SP, Brazil

Water ◽

10.3390/w12061711 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1711 ◽

Cited By ~ 1

Author(s):

Franciane Mendonça dos Santos ◽

Rodrigo Proença de Oliveira ◽

José Augusto Di Lollo

Keyword(s):

Land Use ◽

Sensitivity Analysis ◽

River Basin ◽

Sediment Yield ◽

Assessment Tool ◽

Land Use Changes ◽

Curve Number ◽

Moisture Condition ◽

Land Use Scenario ◽

Effects Of Land Use

The Soil and Water Assessment Tool (SWAT) is often used to evaluate the impacts of different land use scenarios on streamflow and sediment yield, but there is a need for some clear recommendations on how to select the parameter set that defines a given land use scenario and on what is the most appropriate methodology to change the selected parameters when describing possible future conditions. This paper reviews the SWAT formulation to identify the parameters that depend on the land use, performs a sensitivity analysis to determine the ones with larger impacts on the model results and discusses ways to consider future land use conditions. The case study is the Atibaia river basin, with 2838 km2 (São Paulo, Brazil). The parameters identified by sensitivity analysis with the largest impacts on streamflow and sediment yield were the initial curve number for moisture condition II (CN), maximum canopy storage for each land use (CANMX) and the cover and management factor (USLE_C). The identification and appropriate parameter change can provide real estimates of the magnitudes in the land use changes, which were verified in this study. Such information can be used as an instrument for proposing improvements in the basin’s environmental quality and management.

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