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The upper Huaihe River Basin at Huaibin (referred to as the HB catchment hereafter) has a drainage area of 16,005 km2 (Figure 1). It is bounded by the Dabie Mountain to the south and Huang-Huai Plain to the north. The elevation ranges from 27 to 1,031 m above sea level and topography generally decreases from the west to the east. Affected by the monsoon climate, the mean annual (1964–2010) temperature and precipitation are 15.4 °C and 1,076 mm, respectively, and approximately 60% of annual precipitation falls between July and September. In the present study, five sub-catchments within the HB catchment (Dapoling (DPL), Changtaiguan (CTG), Xinxian (XIN), Huangchuan (HC) and Xixian (XX) catchments) are selected for hydro-meteorological analysis. Relevant hydrological information is listed in Table 1. In addition, five large reservoirs and a medium-sized reservoir (Xiangshan) in and around the HB catchment are shown in Figure 1 considering their potential impact on runoff. Specific information on these six reservoirs is listed in Table 2. Obviously, the DPL catchment, within which there are no large reservoirs, is a good selection for hydrological model simulation among these catchments. Accordingly, a comparison of hydrological model simulation and hydrological sensitivity analysis method was conducted in the DPL catchment for evaluating the effectiveness of the two methods.
Table 1

Hydrological characteristics of the six catchments

CatchmentArea (km2)Average elevation (m)Mean annual precipitation (mm)Mean annual streamflow (mm)Daily streamflow records (year)
DPL 1,640 233 1,052.8 374.7 1964–2010 
CTG 3,090 201 1,064.4 361.9 1964–2010 
XIN 274 288 1,339.6 548.9 1967–2010 
HC 2,050 149 1,215.5 456.4 1964–2010 
XX 10,190 155 1,073.3 368.2 1964–2010 
HB 16,005 132 1,075.7 343.3 1964–2010 
CatchmentArea (km2)Average elevation (m)Mean annual precipitation (mm)Mean annual streamflow (mm)Daily streamflow records (year)
DPL 1,640 233 1,052.8 374.7 1964–2010 
CTG 3,090 201 1,064.4 361.9 1964–2010 
XIN 274 288 1,339.6 548.9 1967–2010 
HC 2,050 149 1,215.5 456.4 1964–2010 
XX 10,190 155 1,073.3 368.2 1964–2010 
HB 16,005 132 1,075.7 343.3 1964–2010 
Table 2

Characteristics of the six large reservoirs in and around the HB catchment

ReservoirLocationCompletion date (year)Storage capacity (108m3)Major function
Nanwan 32°7′N, 114°E 1955 16.30 Flood prevention 
Shishankou 32°2′N, 114°23′E 1969 3.72 Irrigation 
Wuyue 31°52′N, 114°39′E 1972 1.20 Irrigation 
Pohe 31°47′N, 114°54′E 1972 2.35 Irrigation 
Nianyushan 31°44′N, 115°22′E 1973 9.16 Flood prevention 
Xiangshan 31°35′N, 114°54′E 1973 0.84 Irrigation 
ReservoirLocationCompletion date (year)Storage capacity (108m3)Major function
Nanwan 32°7′N, 114°E 1955 16.30 Flood prevention 
Shishankou 32°2′N, 114°23′E 1969 3.72 Irrigation 
Wuyue 31°52′N, 114°39′E 1972 1.20 Irrigation 
Pohe 31°47′N, 114°54′E 1972 2.35 Irrigation 
Nianyushan 31°44′N, 115°22′E 1973 9.16 Flood prevention 
Xiangshan 31°35′N, 114°54′E 1973 0.84 Irrigation 
Figure 1

Case study area and locations of hydro-meteorological stations and reservoirs.

Figure 1

Case study area and locations of hydro-meteorological stations and reservoirs.

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