/**
  * This parameter description
  * @return string
  */
 public function getDescription()
 {
     $param = WaterRequestParameters::model()->findByPk($this->parameter);
     if ($param) {
         return $param->description;
     }
     return '';
 }
 /**
  * Returns the data model based on the primary key given in the GET variable.
  * If the data model is not found, an HTTP exception will be raised.
  * @param string $id the identifier of the model to be loaded
  */
 public function loadModel($id)
 {
     $model = WaterRequestParameters::model()->findByPk($id);
     if ($model === null) {
         throw new CHttpException(404, 'The requested page does not exist.');
     }
     return $model;
 }