diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 74b0b6c..1fda378 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -8,7 +8,7 @@ This is a FastAPI-based water network management system (供水管网智能管
 # activate the server environment
 conda activate server
 # Install dependencies
-pip install -r requirements.txt
+<!-- pip install -r requirements.txt -->
 
 # Start the server (default: http://0.0.0.0:8000 with 2 workers)
 python scripts/run_server.py
diff --git a/app/api/v1/endpoints/leakage.py b/app/api/v1/endpoints/leakage.py
index e8ae06c..5c6b62e 100644
--- a/app/api/v1/endpoints/leakage.py
+++ b/app/api/v1/endpoints/leakage.py
@@ -1,9 +1,11 @@
 from typing import Any
 from datetime import datetime
 
-from fastapi import APIRouter, HTTPException
+from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel
 
+from app.auth.dependencies import get_current_user
+from app.domain.schemas.user import UserInDB
 from app.services.leakage_identifier import (
     get_leakage_identify_scheme_detail,
     list_leakage_identify_schemes,
@@ -15,13 +17,15 @@ router = APIRouter()
 
 class LeakageIdentifyRequest(BaseModel):
     network: str
-    observed_pressure_data: str | dict[str, list[Any]] | list[dict[str, Any]] | None = None
+    observed_pressure_data: str | dict[str, list[Any]] | list[dict[str, Any]] | None = (
+        None
+    )
     start_time: float = 0
     duration: float = 24
     timestep: float = 5
     q_sum: float = 0.2
     q_sum_unit: str = "m3/s"
-    output_dir: str = "Results"
+    output_dir: str = "db_inp"
     pop_size: int = 50
     max_gen: int = 100
     output_flow_unit: str = "m3/s"
@@ -30,13 +34,16 @@ class LeakageIdentifyRequest(BaseModel):
     scada_end: datetime | None = None
     sensor_nodes: list[str] | None = None
     scheme_name: str | None = None
-    username: str = "admin"
 
 
 @router.post("/identify/")
-async def identify_leakage(data: LeakageIdentifyRequest) -> dict[str, Any]:
+async def identify_leakage(
+    data: LeakageIdentifyRequest, current_user: UserInDB = Depends(get_current_user)
+) -> dict[str, Any]:
     try:
-        return run_leakage_identification(**data.dict())
+        return run_leakage_identification(
+            **data.model_dump(), username=current_user.username
+        )
     except Exception as exc:
         raise HTTPException(status_code=400, detail=str(exc))
 
@@ -52,10 +59,10 @@ async def query_leakage_schemes(
 
 
 @router.get("/schemes/{scheme_name}")
-async def query_leakage_scheme_detail(
-    network: str, scheme_name: str
-) -> dict[str, Any]:
+async def query_leakage_scheme_detail(network: str, scheme_name: str) -> dict[str, Any]:
     try:
-        return get_leakage_identify_scheme_detail(network=network, scheme_name=scheme_name)
+        return get_leakage_identify_scheme_detail(
+            network=network, scheme_name=scheme_name
+        )
     except Exception as exc:
         raise HTTPException(status_code=400, detail=str(exc))
diff --git a/app/services/leakage_identifier.py b/app/services/leakage_identifier.py
index ca19988..9dfa6da 100644
--- a/app/services/leakage_identifier.py
+++ b/app/services/leakage_identifier.py
@@ -6,6 +6,7 @@ from typing import Any
 
 import numpy as np
 import pandas as pd
+import wntr
 
 from app.algorithms.leakage_identifier import LeakageIdentifier
 from app.infra.db.influxdb import api as influxdb_api
@@ -34,7 +35,7 @@ def run_leakage_identification(
     timestep: float = 5,
     q_sum: float = 0.2,
     q_sum_unit: str = "m3/s",
-    output_dir: str = "Results",
+    output_dir: str = "db_inp",
     pop_size: int = 50,
     max_gen: int = 100,
     output_flow_unit: str = "m3/s",
@@ -46,8 +47,7 @@ def run_leakage_identification(
     username: str = "admin",
 ) -> dict[str, Any]:
     os.makedirs(output_dir, exist_ok=True)
-    inp_path = os.path.join(output_dir, f"{network}.leakage.inp")
-    dump_inp(network, inp_path, "2")
+    inp_path = _prepare_leakage_inp(network)
 
     selected_sensor_nodes = (
         list(dict.fromkeys([node for node in (sensor_nodes or []) if node]))
@@ -500,3 +500,26 @@ def _to_datetime(value: datetime | str) -> datetime:
     if isinstance(value, datetime):
         return value
     return datetime.fromisoformat(value)
+
+
+def _prepare_leakage_inp(network: str) -> str:
+    project_root = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
+    db_inp_dir = os.path.join(project_root, "db_inp")
+    os.makedirs(db_inp_dir, exist_ok=True)
+    inp_path = os.path.join(db_inp_dir, f"{network}.leakage.inp")
+    if _is_valid_inp_file(inp_path):
+        return inp_path
+    dump_inp(network, inp_path, "2")
+    if not _is_valid_inp_file(inp_path):
+        raise ValueError(f"漏损识别 INP 文件无效: {inp_path}")
+    return inp_path
+
+
+def _is_valid_inp_file(inp_path: str) -> bool:
+    if not os.path.isfile(inp_path) or os.path.getsize(inp_path) <= 0:
+        return False
+    try:
+        wntr.network.WaterNetworkModel(inp_path)
+        return True
+    except Exception:
+        return False
diff --git a/tests/api/test_leakage_endpoints.py b/tests/api/test_leakage_endpoints.py
index 7a0cc10..bab360d 100644
--- a/tests/api/test_leakage_endpoints.py
+++ b/tests/api/test_leakage_endpoints.py
@@ -1,5 +1,6 @@
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
+from types import SimpleNamespace
 
 from app.api.v1.endpoints import leakage as leakage_endpoint
 
@@ -7,12 +8,16 @@ from app.api.v1.endpoints import leakage as leakage_endpoint
 def _build_client() -> TestClient:
     app = FastAPI()
     app.include_router(leakage_endpoint.router, prefix="/api/v1/leakage")
+    app.dependency_overrides[leakage_endpoint.get_current_user] = lambda: SimpleNamespace(
+        username="tester"
+    )
     return TestClient(app)
 
 
 def test_identify_leakage_success(monkeypatch):
     def fake_run_leakage_identification(**kwargs):
         assert kwargs["network"] == "demo"
+        assert kwargs["username"] == "tester"
         return {"rows": [], "area_count": 0}
 
     monkeypatch.setattr(