Horizontal sediment mass flux before & after the windy season from vegetation removal plots(Sediment weight at various heights)

Study number: 

228

Data set ID: 

210228001

Data Access: 

Unrestricted

Dataset status: 

Date range: 

2008-03-24 to 2013-05-23

Original investigator: 

Dale A Gillette

Data contact: 

Abstract: 

Dataset consists of horizontal dust flux at multiple heights from BSNE dust collectors located in treatment plots (different percent vegetation removed) and adjacent downwind effect plots. Year 2008 was an annual collection. Collection in subsequent years occurred before and after the wind season. The experiment was designed to test the effects of increasing wind erosion on soil and vegetation properties at the Jornada.  In order to increase wind erosion rates, vegetation was removed to increase bare surface area and stimulate erosion (the less vegetation present the greater the wind erosion).  The basic experimental design includes three treatment blocks.  Each block has four treatment plots with different level of vegetation removed (25-100%) and a control treatment.  Treatment plots are 25x50m with 25m buffers between.  The vegetation removal includes grasses and small shrubs (like XASA and ZIGR), but not mesquite or yucca or any of the larger shrubs).  Also, adjacent downwind plots are included in the design.  These plots are strictly for monitoring of soil and vegetation properties, so no maintenance is required on these areas.

Methods: 

Methods of recording:

lab data sheets

Methodology:

 Basic Experimental Design: The experiment was designed to test the effects of increasing wind erosion on soil and vegetation properties at the Jornada.  In order to increase wind erosion rates, vegetation was removed to increase bare surface area and stimulate erosion (the less vegetation present the greater the wind erosion).  The basic experimental design includes three treatment blocks.  Each block has four treatment plots with different level of vegetation removed (25-100%) and a control treatment.  Treatment plots are 25x50m with 25m buffers between.  The vegetation removal includes grasses and small shrubs (like XASA and ZIGR), but not mesquite or yucca or any of the larger shrubs).  Also, adjacent downwind plots are included in the design.  These plots are strictly for monitoring of soil and vegetation properties, so no maintenance is required on these areas.
 
Collecting BSNEs (Dust Collectors)
 Each treatment area and adjacent downwind area has 6 BSNE stands, each with 6 or 4 dust collectors per vertical stand.  There are two exceptions:  Block 1, Treatment C has 3 downwind stands; Block 2, Treatment 3 has 4 downwind BSNE stands.  On the Treatment 4 Upwind plots (the area with the most vegetation removal) these stands are 3m tall with 6 traps at heights 15, 30, 60, 90, 160, 250 cm respectively.  All the other stands, including Treatment 4 Downwind, the dust collectors are 1 meter tall.  The heights on these are 15, 30, 60, 120 cm.  Heights are based on distance from ground to bottom of BSNE opening when collector is pointing 250° from true North(the prevailing wind direction).  Each upwind and downwind plot has 6 stands with the following exception.  Block 2, Treatment 3 has 6 upwind BSNE stands and 4 downwind BSNE stands.  Sampling. Collection, heights, maintenance.  Except for 2008 when it was an annual collection, BSNEs are collected twice a year, typically February (before windy season) and June (after windy season). As part of the biannual collection, the trap heights need to be measured and adjusted accordingly, along with any other maintenance that needs to be done (such as rewiring the traps, rebalancing the 3 meter stands, veg clipping, etc.).  Vegetation is clipped as needed to allow BSNEs to freely rotate 360º.  The dust from each trap gets placed in a 6x4 inch, 4-mil Ziploc-style bag and appropriately labeled and dated.  See Protocol-for-NEAT-Experiment.docx for finer detail.

Quality assurance: 

Vsual Verification

Additional information: 

Location of blocks:
All 3 blocks are in JER pasture 11A and each has access roads leading out to it.  Block 1 access road is 0.2 miles south from the NW corner of P11a, near the scrape site.  The 10m meteorological(wind) tower is visible from road.  Block 2 access road is longer and is located 0.5 miles south of the Block 1 access road.  Block 3 is 0.7 miles south of Block 2, next to the pipe line, and is visible from the road (also has a 10m tower, so really easy to find).  If you are coming from the South end of P11a then you will hit Block 3 in 0.4 miles after you turn north along fenceline.

Maintenance: 

Quarterly

Long-term dataset: 

Signature dataset: 

Data category: 

LTER VI Proposal Category: 

DOI: 

10.6073/pasta/09d119c74724af5a4c74baf548eaa33a

Research Network: