TABLE OF C0NTP:NTS. 



PAET V. 



PEOTECTION AGAINST NON-ATMOSPHEEIC NATURAL 

 PHENOMENA. 



CHAPTER I. 



PROTECTION AGAINST DAMAGE BY WAfEK. 



PAGE 



Section 1.— Soil-Denudation 582 



„ II. — Inundations 586 



., III.— Swamps. 



1 . Formation 596 



2. Damage done . 597 



3. Pi-otective rules 601 



Section IV. — Drainage. 



1 . Vertical drainage . . . • 604 



2. Surface drainage 604 



3. Covered drains 612 



CHAPTER n. 

 PROTECTION AGAINST AVALANCHES . . . .616 



CHAPTER III. 



PROTECTION AGAINST SHIFTING SAND. 

 Section I. — Sand Dunes. 



L Description 621 



2. Construction of littoral dune 023 



3. Material for fixing the sand . . . 624 



4. Maintenance of the littoral dune 625 



5. Protective coast forest zone 626 



Section II. — Inlant) San'd. 



1. Description 630 



2. Protective rules .... 630 



3. Fixation of the sand 631 



4. Stocking the area 634 



