Sensitivity analysis of conservation opportunities in the irrigated agriculture sector of the Pacific Northwest

Integrated assessment of conservation opportunities in the irrigated agriculture sector of the Pacific Northwest Region

10.2172/6016034 ◽

1985 ◽

Author(s):

B.J. Harrer ◽

A.J. Lezberg ◽

G.L. Wilfert

Keyword(s):

Pacific Northwest ◽

Integrated Assessment ◽

Irrigated Agriculture ◽

Agriculture Sector ◽

The Pacific ◽

Northwest Region

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Drought in the Pacific Northwest, 1920–2013

Journal of Hydrometeorology ◽

10.1175/jhm-d-15-0142.1 ◽

2016 ◽

Vol 17 (9) ◽

pp. 2391-2404 ◽

Cited By ~ 12

Author(s):

Mu Xiao ◽

Bart Nijssen ◽

Dennis P. Lettenmaier

Keyword(s):

Pacific Northwest ◽

Snow Water Equivalent ◽

Irrigated Agriculture ◽

Infiltration Capacity ◽

Drought Period ◽

Variable Infiltration Capacity Model ◽

Capacity Model ◽

The Pacific ◽

Snow Water ◽

The Impact

Abstract The severity–area–duration (SAD) method is used in conjunction with the Variable Infiltration Capacity model (VIC) to identify the major historical total moisture (TM; soil moisture plus snow water equivalent) droughts over the Pacific Northwest region, defined as the Columbia River basin and the region’s coastal drainages, for the period 1920–2013. The motivation is to understand how droughts identified using TM (a measure similar to that used in the U.S. Drought Monitor) relate to sector-specific drought measures that are more relevant to users. It is found that most of the SAD space is dominated by an extended drought period during the 1930s, although the most severe shorter droughts are in the 1970s (1976–78) and early 2000s (2000–04). The impact of the three severe TM droughts that dominate most of the SAD space are explored in terms of sector-specific measures relevant to dryland and irrigated agriculture, hydropower generation, municipal water supply, and recreation. It is found that in many cases the most severe droughts identified using the SAD method also appear among the most severe sector-specific droughts; however, there are important exceptions. Two types of inconsistencies are examined and the nature of the conditions that give rise to them are explored.

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