HydroBASINS lev08 watershed · #4080015040
Bassin de Sông Đáy
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 57 administrative regions : Ba Vì, Ba Đình, Bình Lục, Bắc Từ Liêm, Bỉm Sơn +52
Sub-basin area
5 752,3km²
Upstream area
5 752,3km²
Discharge
174,91m³/s
Mean elev.
65m
Administrative coverage
57 dept-equivalent regions (GADM L2)
- 546.5 km²9.5% of basin
- Nho QuanNinh Bình · Vietnam393.2 km²6.9% of basin
- 363.0 km²6.3% of basin
- 311.9 km²5.4% of basin
- 246.0 km²4.3% of basin
- 238.5 km²4.2% of basin
- 225.2 km²3.9% of basin
- 223.3 km²3.9% of basin
49 moreFull L2 list
- Ứng Hòa188.0 km² · 3.3%
- Thạch Thất186.2 km² · 3.2%
- Gia Viễn177.0 km² · 3.1%
- Kim Bảng176.5 km² · 3.1%
- Thanh Liêm165.0 km² · 2.9%
- Quốc Oai150.8 km² · 2.6%
- Vụ Bản146.2 km² · 2.5%
- Yên Khánh142.7 km² · 2.5%
- Thanh Oai124.5 km² · 2.2%
- Phú Xuyên118.8 km² · 2.1%
- Hoa Lư103.0 km² · 1.8%
- Kim Sơn98.4 km² · 1.7%
- Duy Tiên96.7 km² · 1.7%
- Tam Điệp96.2 km² · 1.7%
- Yên Mô93.4 km² · 1.6%
- Nam Trực90.7 km² · 1.6%
- Phủ Lý87.3 km² · 1.5%
- Nghĩa Hưng84.8 km² · 1.5%
- Phúc Thọ81.8 km² · 1.4%
- Sơn Tây79.8 km² · 1.4%
- Thường Tín78.8 km² · 1.4%
- Hoài Đức76.3 km² · 1.3%
- Ba Vì72.3 km² · 1.3%
- Kỳ Sơn65.9 km² · 1.1%
- Bình Lục58.5 km² · 1.0%
- Thanh Trì52.7 km² · 0.9%
- Hà Đông49.0 km² · 0.9%
- Ninh Bình46.7 km² · 0.8%
- Nam Từ Liêm32.1 km² · 0.6%
- Hoàng Mai24.7 km² · 0.4%
- Nam Định19.7 km² · 0.3%
- Đan Phượng19.0 km² · 0.3%
- Lạc Sơn15.9 km² · 0.3%
- Bắc Từ Liêm15.4 km² · 0.3%
- Mỹ Lộc13.5 km² · 0.2%
- Cầu Giấy12.1 km² · 0.2%
- Lý Nhân10.7 km² · 0.2%
- Đống Đa9.4 km² · 0.2%
- Thanh Xuân9.2 km² · 0.2%
- Cao Phong7.6 km² · 0.1%
- Ba Đình3.2 km² · 0.1%
- Hai Bà Trưng2.9 km² · 0.1%
- Bỉm Sơn2.1 km² · 0.0%
- Tây Hồ1.0 km² · 0.0%
- Hà Trung0.9 km² · 0.0%
- Hòa Bình0.5 km² · 0.0%
- Hoàn Kiếm0.3 km² · 0.0%
- Trực Ninh0.3 km² · 0.0%
- Thạch Thành0.2 km² · 0.0%
9 intersecting protected areas
Cuc Phuong
IUCN IINational Park
106.86 km² overlap
Hoa Lu
IUCN Not ReportedCultural and Historical Site
65.48 km² overlap
Trang An Landscape Complex
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
62.07 km² overlap
Ba Vi
IUCN IINational Park
52.65 km² overlap
Thuong Tien
IUCN IVNature Reserve
51.51 km² overlap
Huong Son
IUCN VCultural and Historical Site
38.45 km² overlap
Van Long
IUCN Not ReportedNature Reserve
33.61 km² overlap
Wetland of International Importance (Ramsar Site)
27.30 km² overlap
Red River Delta
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
21.88 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 591 distinct species · 46 683 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Sông Đáy : 28 espèces reliées par 34 interactions GloBI sur 4 types (connectance 6.4%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
23,8°C
Annual rain
1 729mm
Moisture idx (CMI)
0,24
Runoff
950mm/an
PET
1 308mm
AET
1 070mm
Mean slope
4,0°
Water table
140cm
Forest
1%
Crops
57%
Urban
28%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)