C&EE  HWR 
Margulis Research Group Department of Civil and Environmental Engineering UCLA 
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Freelydistributed "Introduction to Hydrology" etextbook Over the last several years we have developed a freelydistributed electronic textbook for use in hydrology courses. It is currently used as the required textbook for the "C&EE 150: Introduction to Hydrology" undergraduate course at UCLA. The textbook provides a broad foundation in the topics of hydrologic science including: mass balance, basic atmospheric thermodynamics, radiation, atmospheric circulation, precipitation, snow, evapotranspiration, unsaturated flow and infiltration, groundwater, and runoff. The book is available in iBooks and PDF format and leverages many embedded multimedia resources to convey the topics. An emphasis is placed on real problem solving including numerical applications. As such a "Modular Distributed Watershed Educational Toolbox (MODWET)" of MATLAB functions are included with the book. The MODWET codes build up to a fullydistributed watershed model that is described in the final chapter. The fullycoupled MODWET model provides a basis for integrating the set of concepts covered in the class in the context of both qualitative and quantitative demonstrations and experiments. The book is optimized for use within iBooks (i.e. on an iPad or iBooks reader) to take full advantage of multimedia, but a PDF version is also provided (with embedded movies that play when using Adobe Reader) for those who would prefer that format. The book was first offered in 2014. It is currently on its third major edition. Below we provide the new 2016b version (posted on 09/21/2016). The only differences between the 2016a and 2016b editions involve the fixing of minor typos and correcting Figure 11.2.

