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| en:manuel_reference:modeles_stat:validity_ranges [2024/06/05 15:34] – qroyer | en:manuel_reference:modeles_stat:validity_ranges [2024/06/05 15:35] – qroyer |
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| The domains of validity of HABBY's biological models are now documented in the HABBY software itself, which also serves as a library of numerous biological models. Only a few elements concerning Estimhab will be described below. | The domains of validity of HABBY's biological models are now documented in the HABBY software itself, which also serves as a library of numerous biological models. Only a few elements concerning Estimhab will be described below. |
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| WARNING. All units for statistical models are in m, m/s, m3/s | WARNING. All units for statistical models are in m, m/s, m3/s. |
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| ===== Specificities ===== | ===== Specificities ===== |
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| Guilds are groups of species/stages with comparable habitat preferences. The guilds used for Estimhab are: | Guilds are groups of species/stages with comparable habitat preferences. The guilds used for Estimhab are: |
| Guild 'riffle': loach, sculpin, barbel <9cm | * Guild 'riffle': loach, sculpin, barbel <9cm |
| Guild ‘midstream’: barbel >9cm, blageon >8cm | * Guild ‘midstream’: barbel >9cm, blageon >8cm (this guild is considered appropriate for nase, toxostome, dace, grayling) |
| (this guild is considered appropriate for nase, toxostome, dace, grayling) | * Guild ‘pool’: eel, pumpkinseed, perch, roach, chub >17cm |
| Guild ‘pool’: eel, pumpkinseed, perch, roach, chub >17cm | * Guild ‘bank’: gudgeon, blageon <8cm, chub <17cm, minnow |
| Guild ‘bank’: gudgeon, blageon <8cm, chub <17cm, minnow | |
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| The 'channel' guild corresponds to midstream species; it is the guild most favoured by increases in flow (and historically the most affected by reduced flows in regulated rivers). The general slowdown in runoff linked to developments also reduces the proportion of species in the 'riffle' guild. | The 'channel' guild corresponds to midstream species; it is the guild most favoured by increases in flow (and historically the most affected by reduced flows in regulated rivers). The general slowdown in runoff linked to developments also reduces the proportion of species in the 'riffle' guild. |