Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (3.0 MB bytes)

Title: Evaluating the impacts of crop rotations on groundwater storage and recharge in an agricultural watershed

Author: Dakhlalla, Abdullah O.; Parajuli, Prem B.; Ouyang, Ying; Schmitz, Darrel W.;

Date: 2016

Source: Agricultural Water Management

Publication Series: Scientific Journal (JRNL)

Description:

The Mississippi River Valley Alluvial Aquifer, which underlies the Big Sunflower River Watershed (BSRW),is the most heavily used aquifer in Mississippi. Because the aquifer is primarily used for irrigating cropssuch as corn, cotton, soybean, and rice, the water levels have been declining rapidly over the past fewdecades. The objectives of this study are to analyze the relationship and interactions between evapotran-spiration and groundwater recharge rates in the BSRW, and model the effects of various crop rotationpractices on groundwater storage and recharge.The model performed well during the calibration period (R2= 0.53–0.68 and NSE = 0.49–0.66) and val-idation period (R2= 0.55–0.75 and NSE = 0.49–0.72) for daily streamflow, which was achieved by theSUFI-2 auto-calibration algorithm in the SWAT-CUP package. The model also performed well in simulat-ing seasonal water table depth fluctuations during calibration (R2= 0.76 and NSE = 0.71) and validation(R2= 0.86 and NSE = 0.79). This study demonstrated a seasonal relationship between evapotranspira-tion and groundwater storage and recharge in the BSRW SWAT model. In general, groundwater storagedecreased during the summer months while ET rates were high, and increased during the winter andspring months when ET rates were low. The crop rotation scenarios that include rice planting resultedin the lowest groundwater storage (down to −10.7%) compared to the baseline crop scenario, which isdue to the high irrigation rates of the rice crop. However, the rice crop rotations resulted in the highestincreases of groundwater recharge rates (up to +60.1%), likely because of the response to the deficiency ofgroundwater needed for irrigation as well as the limited water uptake by the rice crop. The crop rotationswith corn and cotton resulted in the largest increases in groundwater storage (up to +27.2%), which is theresult of the low irrigation rates as well as the short time period for irrigation applications. The results ofthis study are expected to aid farmers and watershed managers to conserve groundwater resources, butstill maintain crop production.

Keywords: Groundwater, Watershed modeling, Crop rotations, Irrigation, SWAT

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Dakhlalla, Abdullah O.; Parajuli, Prem B.; Ouyang, Ying; Schmitz, Darrel W. 2016. Evaluating the impacts of crop rotations on groundwater storage and recharge in an agricultural watershed. Agricultural Water Management, Vol. 163: 12 pages.: 332-343.  10.1016/j.agwat.2015.10.001

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.