Subwatershed Volumetrics

This layer summarizes storage needs and capacities based on physical drainage boundaries rather than political borders. It is the primary tool for watershed-based planning and identifying downstream impacts. It aggregates "Local" storage (detention ponds) and allocates "Regional" storage (TARP, Reservoirs) to the relevant drainage areas. Key Field Dictionary subwatershedcode / subwatershed: Name of the tributary or waterway branch. bsg_capgap_comb: Combined Storage Deficit. The remaining storage need (ac-ft) after accounting for ALL assets (Local Ponds + Regional Reservoirs + TARP). unit_bsg_capgap_comb: Unmanaged Water Depth. The Capacity Gap normalized by subwatershed area (inches). Indicates flood risk intensity due to the storage capacity gap. bsg_pctmet_comb: Resilience Score (%). The percentage of the Baseline Goal currently met by existing infrastructure. total_comb: Total System Capacity. The sum of all local basins, regional reservoirs, and TARP allocations.本图层基于自然汇水边界而非行政边界，汇总了区域蓄水需求与蓄水能力，是开展流域规划及识别下游影响的核心工具。该图层将归集“本地”蓄水（滞留塘），并将“区域”蓄水（TARP、水库）分配至对应汇水区。 关键字段说明如下： subwatershedcode / subwatershed：子流域编码/子流域名称，指代支流或水系分支的名称。 bsg_capgap_comb：综合蓄水亏缺量。指在计入全部现有蓄水设施（本地滞留塘、区域水库及TARP）后，仍剩余的蓄水需求（单位：英亩-英尺，ac-ft）。 unit_bsg_capgap_comb：未管控水深。指按子流域面积归一化后的蓄水亏缺量（单位：英寸），用于表征由蓄水能力缺口引发的洪水风险强度。 bsg_pctmet_comb：韧性评分（%）。指现有基础设施当前达成基线目标的百分比。 total_comb：系统总蓄水能力。指所有本地汇水区、区域水库及TARP分配蓄水容量的总和。