DRAINAGE PROBLEMS SOLVED

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POOR GARDEN DRAINAGE - THE FACTS

THIS IS A LAYOUT OF YOUR SOIL.

 

WHY DO WE GET POOR DRAINAGE?

THERE ARE SEVERAL CAUSES FOR POOR DRAINAGE, FOR INSTANCE ON NEW HOUSING ESTATES IT CAN BE CAUSED BY SOIL COMPACTION AS A RESULT OF BUILDERS LORRIES AND PLANT THAT ARE USED ON THE BUILDING PHASE.THIS COMBINED WITH A MIXTURE OF SUB SOIL AND TOP SOIL WHEN THE VARIOUS TRENCHES ARE DUG OFTEN LEADS TO A HEAVY WET PLOT.

IN CASES WHERE HOUSING ESTATES ARE BUILT ON OLD ARABLE LAND THAT HAS BEEN PLOUGHED FOR CENTURIES A 'PLOUGH PLAN' MAY HAVE DEVELOPED. THIS IS A LAYER OF IMPERVIOUS COMPACTED SOIL JUST BELOW THE MAXIMUM PLOUGH DEPTH, CAUSED BY YEARS OF POLISHING BY THE SOLE OF THE PLOUGH.

OF COURSE NOT ALL WET SOIL MAY BE CAUSED BY HUMAN ACTIVITY IN SOME SOILS BY ITS NATURE MAY BE WATER RETENTIVE(E.G CLAY SOILS) OR IF IT IS LOW LYING IT MAY BE AFFECTED BY THE NATURAL WATER TABLE.

ON CLAY AND OTHER WATER RETENTIVE SOILS, THE FLOW OF WATER THROUGH THE SOIL IS VERY SLOW THIS CAN BE EXACERBATED IF THE CONTOURS OF THE LAND FORM DEPRESSIONS WHERE THE WATER CAN COLLECT.

ON LAND WHERE THERE IS A NATURAL LOW WATER TABLE LITTLE CAN BE DONE AS IN HEAVY RAIN FALL THE WATER WILL NATURALLY RAISE TO THE SURFACE OR ABOVE IT. IN THIS CASE A POND WILL NATURALLY FORM.

HOW WILL I KNOW IF MY GARDEN NEEDS BETTER DRAINAGE ?

WET WINTER WEATHER WILL SHOW HOW GOOD OR BAD THE NATURAL DRAINAGE IS. PATCHES OF WATER ON THE SURFACE ARE THE MOST COMMON SIGNS OF PROBLEMS.TO CHECK HOW WELL THE LAND DRAINS, DO THE FOLLOWING:

  1. DIG A HOLE APROX 600mm DEEP(24") AND 600mm SQUARE (24")
  2. FILL IT HALF FULL OF WATER
  3. LEAVE FOR 24 HOURS

IN WELL DRAINED SOILS IT SHOULD DRAIN BUT IN VERY WET LAND IT MAY FILL.

WHAT SORT OF DRAINAGE SHOULD BE USED ?

IF THE TOP SOIL IS POOR, IT MAY WELL BE WORTH STRIPPING THE TOP 150mm OF SOIL AND IMPORTING NEW TOP SOIL. WHERE THE TOP SOIL IS JUST VERY WATER RETENTIVE, THE PROBLEMS MAY BE REDUCED BY DOUBLE DIGGING AND BY ADDING LARGE AMOUNTS OF BULKY ORGANIC MATERIALS.(MULCH). WHERE THE SOIL IS INHERENTLY HEAVY AND WATER RETENTIVE SOME SORT OF DRAINAGE SYSTEM WILL BE NECESSARY.

IF YOU NEED ANY FURTHER ADVICE YOU CAN CONTACT ME THROUGH E BAY

IF YOU HAVE FOUND THIS INFORMATION USEFUL PLEASE RATE IT THANKYOU. 

 

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