public void fillLakeWithBottom(SinusoidalLocation bottom) {
    ClosureDivider divider = new ClosureDivider(processor);

    orderedDepressions.remove(bottom);

    divider.divideClosure(bottom, orderedDepressions);
    LocationCollection closure = divider.getClosure();

    SinusoidalLocation drain = divider.getLowestBoundaryDrain(closure);

    processor.addDrainageArrow(bottom, drain);
    if (!processor.hasTransitiveTerminus(drain)) {
      throw new RuntimeException("Drain: " + drain);
    }

    //    System.out.println(bottom + " : " + processor.getDrainageLocation(bottom));

    LocationIterator iterator = closure.iterator();
    while (iterator.hasNext()) {
      SinusoidalLocation next = iterator.next();

      if (comparator.isLowerThan(next, drain)) {
        int difference = processor.getElevation(drain) - processor.getElevation(next);

        processor.setAccumulatedWater(next, difference);
      }
    }

    orderedDepressions = order(divider.getRemaining());
  }
 public SinusoidalLocation removeNextLowestLocation() {
   return orderedDepressions.remove(0);
 }