Water management decisions affect water supply and crop choice in irrigated agriculture. The impacts of management actions on water supply and irrigated croplands are complex in watersheds that cross political and economic boundaries. The Imperial Valley (IV) in the US and the Mexicali Valley (MV) of Mexico are agricultural regions with a commoninternational boundary. Factors behind changing water conditions which may affect agriculture of this region include the following: lining of the All American Canal (AAC) (2007-2009), water transfers and the fallowing program in the Imperial Irrigation District, fluctuating canal flow rates, and infrastructure damage caused by a major earthquake in April 2010. For this thesis, I use MODIS Normalized Difference Vegetation Index (NDVI) 16-day composite (MOD13Q) 250 m spatial resolution time-series of satellite imagery to develop annual crop maps for crop years that preceded (2002-2006) and followed (2010-2014) the lining project and the 2010 earthquake. NDVI images that portray the spatial distribution of crop greenness were classified using unsupervised classification. Data for validation of crop type in IV were provided by the United States Bureau of Reclamation (USBR). Hot spot analysis was performed to evaluate crop transition that happened in areas where statistically significant changes in NDVI occurred between 2006 and 2012. AAC flow data were used to relate crop NDVI to inter-annual variability in available irrigation water. Crop maps were determined to have an overall accuracy of 76% - grasses were identified most accurately, while seasonal crops exhibited substantial confusion. MV showed an increase in seasonal crop production over 2010-2014, while IV showed an opposite trend where grass production increased along with fallow lands, while seasonal fruit/vegetable production declined. Eighteen percent of total IV area was identified as cold spots (decreased NDVI) compared to 10% in MV. Hot spots (increased NDVI) covered only 11% of IV, but represented a much larger portion of MV (16%). Contrary to expectation, NDVI and crop type did not change significantly near the border following the lining of the AAC. Rather, the largest change in cropping in the MV happened in the southwest due to earthquake damage to the main irrigation canal.