Table 5. Calculation and description of upper reach runoff and water use in the Yutian oasis.

Parameter	Formula	Description
Percentage of total runoff consumed by the Yutian oasis	$A=\frac{W1}{R}\times 100\%$	A is the percentage of total runoff consumed by the Yutian oasis; W1 is mean annual irrigation water consumed in the Yutian oasis, or 4.76×108 m3 (2000–2011); R is the mean annual runoff (7.57×108 m3) (1958–2013); B is the summer runoff in the upper reaches; W2 is the proportion total annual runoff by summer flows (66.4%); C is the summer water consumption in the Yutian oasis; W3 is the proportion of total annual water consumption during the summer in the Yutian oasis (53%).
Summer runoff in the upper reaches	$B=W2\times R$
Summer water consumption in the Yutian oasis	$C=W3\times R$

Note: calculations are based on Chen [63].