diff --git a/src/main/java/com/gunshi/project/hsz/service/ForecastResultsService.java b/src/main/java/com/gunshi/project/hsz/service/ForecastResultsService.java
index c7bc5e4..0815b88 100644
--- a/src/main/java/com/gunshi/project/hsz/service/ForecastResultsService.java
+++ b/src/main/java/com/gunshi/project/hsz/service/ForecastResultsService.java
@@ -28,6 +28,8 @@ import java.math.BigDecimal;
 import java.math.RoundingMode;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
 import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -257,6 +259,21 @@ public class ForecastResultsService extends ServiceImpl<ForecastResultsMapper, F
         List<StZvarlB> zvarlBS = stZvarlBService.list(new QueryWrapper<StZvarlB>().eq("stcd", attResBase.getStcd()).orderBy(true, true, "rz"));
         // 水位历史数据
         List<StRsvrR> rsvrRRealList = stRsvrRService.list(new QueryWrapper<StRsvrR>().eq("stcd", attResBase.getStcd()).ge("tm", startTime).le("tm", endTime));
+        for (StRsvrR stRsvrR : rsvrRRealList) {
+            // 使用Java 8时间API
+            Date originalTime = stRsvrR.getTm();
+            if (originalTime != null) {
+                LocalDateTime ldt = originalTime.toInstant()
+                        .atZone(ZoneId.systemDefault())
+                        .toLocalDateTime()
+                        .withMinute(0)
+                        .withSecond(0)
+                        .withNano(0);
+
+                Date truncatedTime = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
+                stRsvrR.setTm(truncatedTime);
+            }
+        }
         List<StRsvrR> resultList = reorganizeRsvrRData(rsvrRRealList, dt);
         List<Date[]> periods = splitByDay8To8(startTime, endTime);
         // v：累计降雨