diff --git a/B08_Quantity/B08_Quantity_UI_Hydro.ts b/B08_Quantity/B08_Quantity_UI_Hydro.ts
index 80512c3b3..07450ae0c 100644
--- a/B08_Quantity/B08_Quantity_UI_Hydro.ts
+++ b/B08_Quantity/B08_Quantity_UI_Hydro.ts
@@ -99,8 +99,8 @@ export async function renderHydro(host: HTMLElement, projectId: string): Promise
       ...sheet.defaults,
       ...(station.sheet === "pipe" ? {} : sheet.sheet_defaults[station.sheet]),
       ...station.linked,
-      ...layer(station, sheet.saved[keyOf(station)]),
-      ...layer(station, drafts[keyOf(station)]),
+      // 초안은 측점 입력 통째 — 있으면 저장본 대신(초안의 null = 연결값으로 되돌림)
+      ...layer(station, drafts[keyOf(station)] ?? sheet.saved[keyOf(station)]),
       sheet: station.sheet,
     }) as HydroInputs;
   /** 연결값과 같은 칸은 null — 저장 · 초안이 연동을 유지(B05 값이 바뀌면 따라옴) · 다르면 손 값 */