Ontologia

HydroBASINS lev08 watershed · #4081071430

Bassin de แม่น้ำน่าน

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 4 administrative regions across 2 countries : Ban Khok, Na Noi, Thongmyxay, Wiang Sa

Pfafstetter: 44306959

Sub-basin area

664,2km²

Upstream area

10 702,3km²

Discharge

128,17m³/s

Mean elev.

510m

Administrative coverage

Hydrographic chain

4 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Si Nan

    IUCN II

    National Park

    408.21 km² overlap

  • Mae Charim

    IUCN II

    National Park

    99.10 km² overlap

  • Nam Poui

    IUCN VI

    National Protected Area

    1.45 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

140 distinct species · 224 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

224 obs · 11 cellules
Obs. / cellule
≥ 153
38–152
7–37
2–6
< 2

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 29 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.

ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de แม่น้ำน่าน : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 21 interactions GloBI sur 3 types (connectance 5.2%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
21
Connectance
0.052
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

24,4°C

Annual rain

1 274mm

Moisture idx (CMI)

-0,25

Runoff

350mm/an

PET

1 701mm

AET

997mm

Mean slope

12,2°

Water table

456cm

Forest

64%

Crops

3%

Urban

0%

Protected

77%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)