Как в компоненте отследить изменение @Input переменной?

<div *ngFor="let Incident of SafetyIncidents; let index = index">
      <mat-checkbox  name="SelectForMorningReport"
                    [(ngModel)]="Incident.SelectForMorningReport"
                    (change)="isChanged(Incident)">
      </mat-checkbox>
      <mat-form-field class="col-md-1">
        <input name=SafetyIncidentImpactId [(ngModel)]="Incident.ImpactId" matInput placeholder="Impact ID"
        (change)="isChanged(Incident)">
      </mat-form-field>
      <mat-form-field class="col-md-2">
          <mat-label>Incident level</mat-label>
          <mat-select [(value)]="Incident.IncidentLevel" [compareWith]="compareObjects" (selectionChange) = "isChanged(Incident)">
            <mat-option>--</mat-option>
            <mat-option *ngFor="let level of incidentLevels" [value]="level">{{level.Title}}</mat-option>
          </mat-select>
        </mat-form-field>
      <mat-form-field class="col-md-4">
        <mat-label>Incident description</mat-label>
        <textarea name="IncidentDescription"
                  [(ngModel)]="Incident.Description"
                  (change)="isChanged(Incident)"></textarea>
      </mat-form-field>
      <mat-form-field >
        <mat-label>Actions taken</mat-label>
        <textarea name="ActionsTaken"
                  [(ngModel)]="Incident.ActionsTaken"
                  (change)="isChanged(Incident)">
        </textarea>
      </mat-form-field>