Dr. Patricia Ann J. Sanchez

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Patricia Ann J. Sanchez, Ph.D.

Associate Professor 4


Pat Sanchez is an agricultural engineer with research interests in environmental hydrology, climate change impacts, adaptation, mitigation, disaster risk reduction and management, water resources management, extreme events hydrological modelling and crop modelling. She coordinates and co-teaches Ecosystem Structure and Dynamics, Contemporary Issues in Environment and Development, Environmental Hydrology (special topics) and Graduate Seminar classes. 


Academic History

BSc in Agricultural Engineering, University of the Philippines Los Baños, 2000

MSc in Agricultural Engineering, Iowa State University, 2004

PhD in Civil Engineering, University of Tokyo, 2011


Contact Details

Telefax: +63 49 5362251

Water Center: Telefax: +63 49 5722489

Mobile: +63 9175388954

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.


Courses: ENS 201, ENS 275, ENS 291, ENS 299


Selected Publications:




Ishiwata,H., Yokomatsu, M., Elagaty,M., Koike, T., Sawada, Y., Jaranilla-Sanchez, P.A., and Y. Suzuki.(2017) Two-Country Computable Equilibrium Model of International Drought Risk Sharing:The Case of Pakistan and the Philippines, IEEE. 

Shrestha, M., Jaranilla-Sanchez, P.A., and L. Wang (2015) Investigating the hydrologic response of current dam operation system to future climate in a snowy river basin (Yattajima) of Japan, Ann.Jour. Hydraul. Eng.-JSCE, Vol 59.

Jaranilla-Sanchez, P.A., Koike, T., Shibuo, Y., Matsumura, A., Ogawada, D., Saavedra, O. and Y.Tanaka. Climate Change Impact Assessment for Metro Manila and its Adjoining Areas, International Journal of Water Resources Development, CIJW-2014-0291. (Submitted)

Toshio Koike, Petra Koudelova, Patricia Ann Jaranilla-Sanchez, Asif Mumtaz Bhatti, Cho Thanda Nyunt, Katsunori Tamagawa. (2014) River management system development in Asia based on data integration and analysis system (DIAS) under GEOSS. Science China Earth Sciences. Online publication date: 15-Nov-2014.

Sawada, Y., T. Koike, and P. A., Jaranilla-Sanchez (2014), Modeling hydrologic and ecologic responses using a new eco-hydrological model for identification of droughts, Water Resour. Res.,50, 6214–6235, doi:10.1002/2013WR014847.

Jaranilla-Sanchez, P.A., Shibuo, Y. and T. Koike. 2013. Optimization of Dam Operation for maximizing water use and flood prevention: A case of Angat Dam, Philippines. Society for Social Management Systems, SMS13-3910.http://management.kochi-tech.ac.jp/ssms_papers/sms13-3910_79d28450462af2b7225dc909b4ee78f9.pdf

Jaranilla-Sanchez, P.A., T. Koike, L. Wang, T. Ohta, Y. Yamada, M. Kimoto, (2014) Extreme events prediction from Seasonal Climate Forecasting and Crop Production Simulations in Pampanga River Basin, Philippines. Ann.Jour. Hydraul. Eng.-JSCE, Vol 58.


Jaranilla-Sanchez, P.A., T. Koike, C.T. Nyunt, M. Rasmy, I. Hasegawa, A. Matsumura, D. Ogawada (2013), Hydrological Impacts of a Changing Climate on Floods and Droughts in Philippine River Basins, JSCE, Ann.Jour. Hydraul. Eng.-JSCE, Vol.57.


Nyunt, C.T., P.A.J. Sanchez, A. Yamamoto, T. Nemoto, M., Kitsuregawa and T. Koike (2013), Bias correction method for climate change impact assessments in the Philippines, Ann.Jour. Hydraul. Eng.-JSCE, Vol.57.


Rasmy, M., T, Koike, P.A.Jaranilla-Sanchez, C.T.Nyunt, M. Hara, M. Fujita and H. Kawase (2013), Identifying Gaps and Opportunities Between Statistical and Dynamical Downscaling Approaches Over Shikoku Island, Japan, Ann.Jour. Hydraul. Eng.-JSCE, Vol.57.


Jaranilla-Sanchez, P.A., L. Wang and T. Koike (2012), Integrated Modelling of Climate Change Impacts in the Yoshino River Basin, Japan for Basin Management Planning, Ann.Jour. Hydraul. Eng.-JSCE, 56, No. 4, I_133-I_138, 2012. 


Jaranilla-Sanchez, P.A., L. Wang and T. Koike (2011), Modeling the Hydrologic responses of the Pampanga River Basin, Philippines: A quantitative approach for identifying droughts, Water Resour. Res. DOI: 10.1029/2010WR00972.


Jaranilla-Sanchez, P.A., L. Wang, and T. Koike (2009), ENSO influence on the 1982-2000 Hydrological Properties of the Pantabangan-Carranglan Watershed, Ann.Jour. Hydraul. Eng.-JSCE, 54, 19-24. 


Lasco, R.D., F.B.Pulhin, P.A.J. Sanchez, G.B. Villamor and K.A.L.Villegas (2008). Climate Change and Forest Ecosystems in the Philippines: Vulnerability, Adaptation and Mitigation. World Agroforestry Centre (Working Paper). 


Lasco, R.D., K.L.Villegas, P.A. Jaranilla-Sanchez and G.B. Villamor (2008). Climate Change R& D at the World Agroforestry Centre (ICRAF)-Philippines. World Agroforestry Centre.


Lasco, R.D., F.B.Pulhin, P.A.J. Sanchez, G.B. Villamor and K.A.L.Villegas (2008). Climate Change and Forest Ecosystems in

the Philippines: Vulnerability, Adaptation and Mitigation. Journal of Environmental Science and Management.11(1):1-14. 


Lasco, R.D., F.B.Pulhin, P.A.Jaranilla-Sanchez, R. Gerpacio and R.J.P. Delfino (2009). Mainstreaming adaptation in developing countries: The case of the Philippines. Climate and Development: 131-146.


Lasco, R.D., Pulhin, F.P., Jaranilla-Sanchez, P.A., Delfino, R.J., Gerpacio, R. and K. Garcia. 2009. Mainstreaming adaptation in developing countries: The case of the Philippines. CLIMATE AND DEVELOPMENT 1(2009) 130-146 doi:10.3763/cdev.2009.0009 $2009 Earthscan ISSN: 1756-5529 (print), 1756-5537 (online) www.earthscanjournals.com




Espaldon, MVOE, Villanueva, JDV, P.Jaranilla-Sanchez. 2005. Philippine Landcare after Nine Years: Its impacts on communities, farming households and the local environment in Mindanao, Philippines. ICRAF (Occasional Paper #4)




Jaranilla-Sanchez, P.A., Lasco, R.D., Villamor, G.B., Gerpacio, R., Nilo, G.P. and K.L.Villegas. 2007. A Primer on Climate Change Adaptation in the Philippines. World Agroforestry Centre Philippines.


The Philippine Recommends for Agroforestry Technical Committee. The Philippine Recommends for Agroforestry. 2006. Los Baños Laguna. PCARDS DOST/ICRAF-Philippines. 90p. (Philippine Recommends Series No. 59-A).




Jaranilla-Sanchez, P.A. 2011. Quantitative Analysis of Droughts in Southeast Asian Watersheds. PhD Dissertation, University of Tokyo. Japan.


Jaranilla-Sanchez, P.A. 2004. Impacts of Outdoor Poultry Stockpiles on the Quality of Surface Run-off and Subsurface Water. Masters Thesis, Iowa State University, Ames, Iowa, USA.

Jaranilla, P.A. 2000. Determination of the Crop Coefficients of the Leaf Lettuce (Lactuca sativa L.var. crispa L.) at its various Phenological Stages. B.S. Ag. Engineering Thesis, U.P. Los Baños, College Laguna. Philippines.