Watershed mass balance load budgets

Figure 4.  Watershed mass balance load budgets of (A) sediment, and attached (B) carbon, (C) phosphorus, and (D) nitrogen for the nontidal Chesapeake Bay watershed. Budget residual term is calculated from mass balance of estimated terms and includes all unestimated sources and sinks of both dissolved and particulate forms. Downstream export estimates total (dissolved and particulate) phosphorus and nitrogen loads and only particulate carbon loads (not including dissolved carbon). Percent contribution of sediment and elemental source terms are included.