diff --git a/E03_StabSection/E03_StabSection_Engine_Station.py b/E03_StabSection/E03_StabSection_Engine_Station.py
index dbfdae283..79da300be 100644
--- a/E03_StabSection/E03_StabSection_Engine_Station.py
+++ b/E03_StabSection/E03_StabSection_Engine_Station.py
@@ -8,6 +8,7 @@ import time
 
 from E03_StabSection.E03_StabSection_Engine_Model import section_model_from_b06
 from E03_StabSection.E03_StabSection_Engine_Search import METHODS, analyze
+from E03_StabSection.E03_StabSection_Types import groundwater as norm_groundwater
 
 #: 활동면 최소 깊이(m) — 지표를 얇게 긁는 면(표토 박리)은 사면 붕괴로 보지 않음.
 MIN_DEPTH_M = 0.3
@@ -26,10 +27,14 @@ def analyze_station(
     noncircular: bool = True,
     min_depth: float = MIN_DEPTH_M,
     case_workers: int = 1,
+    groundwater_for=None,
     **model_kw,
 ) -> dict:
     """측점 하나 — case_workers > 1 이면 비탈 × 조건 경우를 프로세스로 나눠 돎(측점 하나만 다시 셀 때).
 
+    groundwater_for(condition, model) → 엔진 지하수 꼴 — 주면 조건마다 모형 지하수를 갈아 끼움
+    (E02 `station_groundwater` 꼴) · None 이면 모형 기본(우기 = 지표 수위).
+
     서버 프로세스 안에서는 1(차례로) 그대로 둠 — 자식이 main.py 를 다시 읽음(`Worker` 머리글).
     """
     t0 = time.perf_counter()
@@ -46,6 +51,8 @@ def analyze_station(
             seismic_kh=seismic_kh if cond == "seismic" else 0.0,
             **model_kw,
         )
+        if groundwater_for is not None:
+            model["groundwater"] = norm_groundwater(groundwater_for(cond, model))
         out.setdefault("areas", model["areas"])
         jobs += [(cond, model, side) for side in model["sides"]]
     kw = {"methods": methods, "noncircular": noncircular, "min_depth": min_depth}
diff --git a/resources/tester/test_532_4_stab_walls_water.py b/resources/tester/test_532_4_stab_walls_water.py
index 4b688811b..86bb68eb5 100644
--- a/resources/tester/test_532_4_stab_walls_water.py
+++ b/resources/tester/test_532_4_stab_walls_water.py
@@ -238,6 +238,28 @@ def test_지하수_측점_모형에_끼움():
     assert res["methods"]["bishop"]["min"]["F"] > 0  # 끼운 모형이 엔진에서 돎
 
 
+def test_측점_해석_groundwater_for_인자():
+    ground = ground_model.build_initial(ground_model.load_defaults(), [])
+    ground["groundwater"].update(wet_mode="ru", ru=0.3)
+    seen = []
+
+    def gw_for(cond, model):
+        seen.append(cond)
+        return ground_model.station_groundwater(ground, cond, model)
+
+    kw = {"conditions": ("dry", "wet"), "methods": ("bishop",), "noncircular": False}
+    base = analyze_station(CROSS, DESIGN, **kw)
+    out = analyze_station(CROSS, DESIGN, groundwater_for=gw_for, **kw)
+    assert seen == ["dry", "wet"]
+    F = {(c["condition"], c["side"]): c["min_F"]["bishop"] for c in out["cases"]}
+    F0 = {(c["condition"], c["side"]): c["min_F"]["bishop"] for c in base["cases"]}
+    for (cond, side), f in F.items():
+        if cond == "dry":
+            assert f == pytest.approx(F0[cond, side])  # 건기 = 수위 없음 그대로
+        else:
+            assert f > F0[cond, side]  # r_u 0.3 < 지표 포화
+
+
 @pytest.fixture
 def project(tmp_path, monkeypatch):
     async def fake_project(_project_id):