Evolution of Hydrological Drought in Human Disturbed Areas: A Case Study in the Laohahe Catchment, Northern China

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">Changed period</td><td align="center" rowspan="2">Number of droughts</td><td align="center" colspan="2">⁢Duration (month)</td><td align="center" colspan="2">Deficit (mm)</td></tr><tr class="thead"><td align="center">Mean</td><td align="center">Max</td><td align="center">Mean</td><td align="center">Max</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td align="left">Observed</td><td align="center">27</td><td align="center">7.5</td><td align="center">29</td><td align="center"><span style="width: 29.5245ptpx;"><svg height="8.69875pt" id="M28" style="vertical-align:-0.3499298pt" version="1.1" viewbox="-0.0498162 -8.34882 29.5245 8.69875" width="29.5245pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M535 230V280H52V230H535Z" 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align="center">32</td><td align="center">4</td><td align="center">6</td><td align="center"><span style="width: 29.5245ptpx;"><svg height="8.69875pt" id="M30" style="vertical-align:-0.3499298pt" version="1.1" viewbox="-0.0498162 -8.34882 29.5245 8.69875" width="29.5245pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M535 230V280H52V230H535Z" id="g117-33"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="587" vert-adv-y="587"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,7.631,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g113-50"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="480" vert-adv-y="480"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,13.871,0)"><path d="M113 -12C146 -12 170 11 170 46C170 78 146 103 114 103S58 78 58 46C58 11 82 -12 113 -12Z" 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Drought characteristics (using the 70-percentile monthly threshold) for the observed and simulated runoff during 1980–2009.

Advances in Meteorology

tab3

Table 3

Table 3: Evolution of Hydrological Drought in Human Disturbed Areas: A Case Study in the Laohahe Catchment, Northern China 