site designs involving several hundred thousand to over a million square feet and projected overburden heights of zero to over two hundred feet significantly greater fluid flow along the generally horizontal geonet 30 may be provided than with comparable prior art geonets it is believed that with geonets 30 configured as with the present invention the round strands 34 a 34 b will provide a reliable height of the geonet 30 and thereby serve to facilitate flow along the plane of the geocomposite by contrast with the prior art strands 14 shown in fig1 3 even though they are themselves substantially incompressible hdpe creep of the strands 14 of such geonets will eventually result in the strands 14 folding over in a relatively short amount of time once begun for example testing has shown that under loading of 7500 to 15 000 psi the strands 14 of such geonets 12 may be caused to fold over flat in 10 000 hours or less such rollover will of course cause the two groups of strands 14 to present a height which is substantially less than the combined long dimension of two sets of strands and thereby significantly and undesirably reducing the transmissivity flow capacity provided by such prior art geocomposite 10 testing has also shown that at higher loadings such as 30 000 psi transmissivity for geonets according to the present invention is higher than it is for prior art geonets of fig1 3 having comparable material usages i e transmissivity per mass per unit area is greater with the geonets of the present invention a geocomposite 50 incorporating the geonet 30 of the present invention is shown in fig6 in the illustrated geocomposite 50 geotextiles 54 56 such as e g nonwoven needlepunched geotextiles spun bonded or heat laminated.