PUB in practice: case studies - Runoff Prediction in Ungauged Basins: Synthesis across Processes, Places and Scales - page 278

Figure 11.6. Location of the study area and positions of the 13 stream gauging stations. Pictures show (counter clockwise) Xining city,
the capital of Qinghai province; arable land transferred back to grass and forest; arable land and roads in the mountainous area of the Huangshui
Basin.

The Huangshui catchment covers an area of 16 120 km 2 ,
has the shape of a leaf, and is located between 36 02

area receives much more precipitation than the down-
stream area. The annual precipitation in a valley area
between Xining and Minhe varies from 250 mm/yr to
350 mm/yr, while more than 600 mm/yr precipitation is
received in the mountain areas.
Huangshui catchment has a very inclining hypsography,
with altitudes ranging from 4900 m to 1650 m, rising
gradually from south-east to north-west. The minimum
elevation is located in the valley near the Gansu

ʹ -

37 28 N and 100 42 103 04

E. There are 13 stream
gauging stations in operation in the Huangshui catchment
( Figure 11.6 ). The annual average runoff is 2.2 × 10 9 m 3 /
yr, the average flow rate is 66 m 3 /s, and the average runoff
depth is 138 mm/yr.
The Huangshui catchment is fed by water vapour from
the Indian Ocean and Bay of Bengal. The climate is classi-
fied as semi-humid, with an average annual precipitation of
486 mm/yr. The annual precipitation distribution is very
uneven, with a C v ranging from 0.15 to 0.30. The upstream

ʹ - ʹ ʹ

- Qinghai

border.
Along the river, we distinguish 13 non-overlapping
drainage areas between existing gauges (see Figure 11.6 ).