FACTS:

Cagayan River separates Solana on the west and Tuguegarao on the east.  Agustin was the owner of the eastern lot while the western lot was owned by the private respondent.  Through the years, the Cagayan river eroded the eastern portion depositing the alluvion to the western portion.  After a big flood, the river cut through the lot of private respondent, whose lands were  transferred  to  the  eastern  lot.    The  private  respondent  tried  to cultivate but they were stopped by the men of Agustin.  
 

HELD:

Accretion  belongs  to  the  riparian  owners  upon  whose  lands  the  alluvial deposits were made.