Hydrologic response units (HRU) are specific areas within the watershed that are identified from possible combinations of soil types, land use, and slopes. They are important because they make it possible to identify critical areas susceptible to contamination processes due to excess nutrients from crops in soils adjacent to the watercourse.
To generate HRUs in the sub-basin, 1% was taken into account for land use and cover, 6% as a minimum value for soil type and 10% for slope range, 607 HRUs were generated distributed in the sub-basin. Thus, the largest extension of HRUs corresponds to anthropized coverages related to the main productive activity in the area, cattle ranching. The representativeness of natural regulating cover, such as dense forest, is low and is found mainly in the highlands, where agricultural production is limited.

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This layer is an output of the SWAT model implementation in the Las Piedras River basin, it was validated with communities and institutions in participat…

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