Nitrate Export Patterns Across 228 U.S. Watersheds Under Different Land Uses

Wei Zhi from Pennsylvania State University synthesized data for 228 U.S. watersheds and performed 500 reactive transport model simulations. The work tests the 'shallow and deep hypothesis' linking subsurface chemical contrasts to nitrate export patterns. It reveals amplified chemical contrasts from human activity, with flushing patterns in agricultural lands and dilution patterns in urban watersheds.

Use Cases

• Modeling nitrate export patterns based on subsurface chemical contrasts described in the hypothesis.
• Analyzing the relationship between streamflow concentration patterns (flushing vs. dilution) and land use (agriculture vs. urban).
• Forecasting nutrient export exacerbation under future climate scenarios with intensified flooding events.
• Challenging assumptions about chemostasis and legacy nutrient stores in agricultural watersheds.

Strengths

• Data synthesis covers 228 U.S. watersheds, providing broad spatial coverage.
• Analysis is supported by 500 reactive transport model simulations.
• The dataset spans broad climate, geology, and land conditions as mentioned in the description.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Pennsylvania State University

Collection Method

Data synthesis and reactive transport modeling

Geography

United States