Warning messages are listed below (48 elements):

arno-hmu-17.10m3s-18-01-2013.shp - HMU number 14 (backwater) - gradient value 1.51 % higher than the maximum common value of 1.0 %
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 1 (glide) - point measurement density (0.025 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 10 (pool) - point measurement density (0.021 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 15 (glide) - point measurement density (0.015 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 17 (pool) - point measurement density (0.009 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 19 (glide) - point measurement density (0.015 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 20 (pool) - point measurement density (0.007 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 21 (glide) - point measurement density (0.004 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 22 (glide) - point measurement density (0.002 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 23 (riffle) - point measurement density (0.005 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 24 (glide) - point measurement density (0.007 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 25 (riffle) - point measurement density (0.012 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 26 (glide) - point measurement density (0.008 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 27 (glide) - point measurement density (0.015 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-1.17m3s-05-08-2013.txt - HMU number 7 (glide) - point measurement density (0.023 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 1 (riffle) - point measurement density (0.01 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 16 (glide) - point measurement density (0.018 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 17 (rapid) - point measurement density (0.005 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 18 (glide) - point measurement density (0.004 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 19 (glide) - point measurement density (0.005 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 2 (rapid) - point measurement density (0.008 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 20 (riffle) - point measurement density (0.006 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 22 (glide) - point measurement density (0.001 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 23 (riffle) - point measurement density (0.002 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 24 (riffle) - point measurement density (0.012 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 25 (riffle) - point measurement density (0.008 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 3 (riffle) - point measurement density (0.006 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 4 (glide) - point measurement density (0.015 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 5 (rapid) - point measurement density (0.007 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 6 (riffle) - point measurement density (0.011 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-17.10m3s-18-01-2013.txt - HMU number 8 (rapid) - point measurement density (0.005 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 1 (glide) - point measurement density (0.015 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 10 (riffle) - point measurement density (0.005 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 11 (glide) - point measurement density (0.003 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 12 (rapid) - point measurement density (0.016 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 13 (riffle) - point measurement density (0.007 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 14 (glide) - point measurement density (0.001 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 15 (glide) - point measurement density (0.003 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 16 (glide) - point measurement density (0.004 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 17 (riffle) - point measurement density (0.01 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 18 (riffle) - point measurement density (0.016 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 2 (riffle) - point measurement density (0.017 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 3 (riffle) - point measurement density (0.018 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 4 (glide) - point measurement density (0.009 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 5 (glide) - point measurement density (0.017 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 6 (rapid) - point measurement density (0.009 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 7 (glide) - point measurement density (0.014 points per square meter) is lower than the minimum common value (0.025 points per square meter)
arno_tabella_testo-7.15m3s-30-04-2013.txt - HMU number 9 (rapid) - point measurement density (0.008 points per square meter) is lower than the minimum common value (0.025 points per square meter)
