Hydroinformatics ▪ Climate Change ▪ Remote sensing ▪ GIS ▪ Modelling.

SARA (Spatial Analysis of surface Runoff in ArcGIS)

Software availability

Developer: Rafael Hernández-Guzmán

Contact address: INIRENA-UMSNH. Av. San Juanito Itzícuaro s/n. Col. Nueva Esperanza. CP 58330. Morelia, Michoacán, México

Email: rhernandez.g@gmail.com

First year available: 2012

Software requirements: ArcGIS 9.3 to ArcGIS 10.8

Hardware requirements: PCs with Windows.

Programming language: Visual Basic 6.0

Availability and cost: SARA v1.0 is available free upon request to the authors.


SARA is an interface to estimate curve number and runoff volume for hydrologic evaluations. This version runs in a vector platform as with other extensions of ArcGIS, introducing changes to the original Natural Resources Conservation Services-Curve Number method, and allowing adaptation to local conditions. The programming syntax was developed in Visual Basic 6.0 as an ActiveX Dynamic Link Library (DLL) to interact with ArcMap, and it is released as Free and Open Source Software (FOSS) that can be modified or upgraded to other programming languages.

sara interface

How to install

Please, follow these instructions to add the tool to ArcMap

How to cite

Hernández-Guzmán R., Ruiz-Luna A. (2013). SARA - An enhanced curve number-based tool for estimating direct runoff. Journal of Hydroinformatics, 15(3):881-885. https://doi.org/10.2166/hydro.2013.145