Process and related apparatus for repairing aquatic propeller scars

Abstract

A process and apparatus for planting aquatic plants underwater on the bottom of estuaries in propeller scars and for encouraging plant growth in propeller scars. Aquatic plant shoots are transplanted by positioning shoots in a sediment tube which is in turn placed in the propeller scar. When the sediment tube is placed in the propeller scar the sea grass shoots are held in position for an extended period of time to allow the sea grass shoots to take root on the estuary bottom. The sediment tubes may be preformed or they may be formed just prior to their placement in the estuary. A watercraft may be used to position the sediment tubes with and without sea grass shoots over an area of the propeller scar. With the process and apparatus of this invention, sea grass plants can be replanted on the bottom of an estuary and new plant growth encouraged in propeller scars. Further in accordance with another embodiment of this invention a tube or other obstruction without plant shoots is placed in a propeller scar in order to impede water flow through the propeller scar. When water flow through the propeller scar is impeded natural plant growth is encouraged.

1 . A process for planting aquatic plants in a propeller scar which comprises placing an elongated sediment tube in the propeller scar, wherein said sediment tube incorporates a growing medium and has a plurality of sea grass shoots protruding therefrom.  
   
   
       2 . A process for planting aquatic plants underwater into a propeller scar which comprises the steps of; 
 a. forming a sediment tube which has a plurality of sea grass shoots protruding therefrom,    b. positioning said sediment tube in a suitable apparatus for causing said sediment tube sock to be placed in the propeller scar, wherein said sediment tube is adapted to disintegrate in a predetermined period of time.    
   
   
       3 . The process of  claim 1  wherein the sediment tube is filled with a medium which is conducive of aquatic plant growth and wherein the sediment tube disintegrates as a result of the aquatic environment.  
   
   
       4 . The process of  claim 2  wherein the sediment tube is filled with a medium which is conducive to aquatic plant growth and wherein the planting sock disintegrates as a result of the aquatic environment.  
   
   
       5 . The process of  claim 1  wherein the sediment tube is filled with a mixture of sand and fertilizer.  
   
   
       6 . The process of  claim 2  wherein the sediment tube is filled with a mixture of sand and fertilizer.  
   
   
       7 . A process for encouraging the growth of aquatic plants in a propeller scar which comprises placing an obstruction in the propeller scar, wherein said obstruction impedes the flow of water through the propeller scar thereby allow native aquatic plants to root in the propeller scar.  
   
   
       8 . A process for encouraging the growth of aquatic plants underwater in a propeller scar which comprises the steps of: 
 a. forming a sediment tube which is filled with a growth medium,    b. positioning said sediment tube in a propeller scar, wherein said sediment tube is adapted to impede the flow of water in the propeller scar and is adapted to disintegrate in a predetermined period of time.    
   
   
       9 . The process of  claim 7  wherein the obstruction is a baffle which is positioned transverse to the propeller scar and the baffle disintegrates as a result of the aquatic environment.  
   
   
       10 . The process of  claim 8  wherein the sediment tube is filled with a medium which is conducive to aquatic plant growth and wherein the tube disintegrates as a result of the aquatic environment.  
   
   
       11 . The process of  claim 8  wherein the tube is filled with a mixture of sand and fertilizer.  
   
   
       12 . The process of  claim 2  wherein the terminal ends of the sediment tube incorporate means wherein a plurality of tubes can be attached to each other.  
   
   
       13 . A tube which is useful in the restoration of sea grass comprising an elongated structure which is formed from a biodegradable flexible material which is filled with sand wherein the length of the tube is at least 10 times the diameter of the tube.  
   
   
       14 . The tube of  claim 13  wherein the length of the tube is between 10 and 30 times the diameter of the tube.  
   
   
       15 . The tube of  claim 13  wherein the tube further incorporates a plurality of sea grass shoots.  
   
   
       16 . The planting tube of  claim 14  wherein the tube further incorporates a plurality of sea grass shoots.  
   
   
       17 . A process for manufacturing a tube which is useful in the restoration of sea grass which comprises the steps of: 
 a. forming an elongated support which has an elongated slot along the outer axis thereof,    b. placing an elongated sheet of a biodegradable material on the inside of said support, such that the transverse edges of the elongated sheet are approximate the elongated slot,    c. filling the elongated sheet contained in the support with a growth medium.    
   
   
       18 . The process of  claim 17  wherein a plurality of plant shoots are then placed in the formed tube.  
   
   
       19 . The process of  claim 7  wherein the obstruction is a brick which placed transverse across the propeller scar.  
   
   
       20 . The process of  claim 19  wherein the brick is adapted to disintegrate over a predetermined period of time.