The mean annual precipitation and temperature of the YR are highly variable across the river basin and correspond with changes to the geology of the river. The upper reaches are located in arid regions with low annual precipitation (368 mm/year). The semi-arid middle reaches have an annual precipitation of 562 mm/year, while the lower reaches are more humid, with an annual precipitation of more than 600 mm/year. The annual mean temperature varies from 1 to 4 °C in the upper reaches, 8 to 14 °C in the middle reaches, and 12 to 14 °C in the lower reaches, with the highest temperatures occurring in July and the lowest in January. Table 1 lists the mean precipitation and runoff values in different reaches of the YRB. These variables display large variabilities between reaches.

Table 1

Summary of major variables for different reaches of the YRB

ReachPrecipitation mean (mm/yr)Length kmArea km2Streamflow mean (106 m3)Temperature mean (°C)
Upper reaches 368 3,471 385,996 33,896.6 1–4 
Middle reaches 562 1,206 343,751 56,166.22 8–14 
Lower reaches 648 786 22,726 56,429.22 12–14 
ReachPrecipitation mean (mm/yr)Length kmArea km2Streamflow mean (106 m3)Temperature mean (°C)
Upper reaches 368 3,471 385,996 33,896.6 1–4 
Middle reaches 562 1,206 343,751 56,166.22 8–14 
Lower reaches 648 786 22,726 56,429.22 12–14 
View Large

Close Modal
This Feature Is Available To Subscribers Only

or Create an Account

Close Modal
Close Modal
This site uses cookies. By continuing to use our website, you are agreeing to our privacy policy.
Accept