Land use trends in the Trinity River basin
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Land use trends in the Trinity River basin

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Describes several natural resource challenges facing the Trinity River basin and how different land uses can affect water resources.

Describes several natural resource challenges facing the Trinity River basin and how different land uses can affect water resources.

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    Land use trends in the Trinity River basin Land use trends in the Trinity River basin Presentation Transcript

    • What is land use? How the land is managed, whether it is foragriculture, wildlife, industry, timber, orurbanization
    • What is land cover? Land cover refers to the biological orphysical features on the land Crop fields, native rangeland, improvedpasture, lakes, forests, pavement
    • 2006 NLCD Land Use/Land CoverCropland (< 1%)Forest (20%)Developed: High (<1%)Developed: Low (5%)Grassland (8%)Wetlands (21%)Open Water (2%)Pasture/Hay (42%)
    • Factors That Affect Land Use Population growth For every 1,000new residents,Texas loses 149acres In top 50 growthcounties, 270acres are lost forevery 1,000 newresidentsTexas’ top 25 growth counties from 1997-2007
    • Factors That Affect Land Use Agricultural economicuncertainty Drought Supply and Demand Estate TaxesOctober 11,2011
    • Factors That Affect Land Use Increasing landvalues leads togreaterfragmentation Dividing up ofland into smallerpatches More landowners= Differentmanagementperspectives
    • No Fragmentation
    • Fragmentation
    • Fragmentation 5,000 new properties in the 1-100 size class Resulting problems Loss of sustainable wildlife habitat Reduced agricultural productivity
    • Fragmentation Reduced economic sustainability for landowners
    • Fragmentation in the Trinity? 71,600 acresadded to 1-100size class 140,500 acresadded to 2000+size class More evidence ofconsolidation thanfragmentation inthe middle Trinity
    • Fragmentation in the Trinity? Fragmentation moresevere north ofHouston andmoderate north ofD/FW Significantconsolidation in themiddle basin How about yourarea?
    • Trinity Basin Land Use Trends Loss of 257,000acres of nativerangeland Gain of 334,000acres of non-nativepasture Loss of 231,000acres of cropland Gain of 82,000acres in wildlife
    • Land Use Effects on Water Surface runoff = 24% Infiltration = 75% Wildlife habitat!Bunchgrasses Sodgrasses Surface runoff = 45% Infiltration = 54% Fertilizers?
    • Land Use Effects on Water Maintain vegetation in riparian areas Reduces erosion, benefits water and wildlife
    • Land Use Effects on Water Riparian soils can hold more water and greater forageproduction can be periodically grazed
    • Land Use Effects on Water Roots anchor soil and reduce flood damage
    • Land Use Effects on Water Less erosion = Less sediment filling lakes
    • Land Management Tool - TRIMS TRIMS
    • Conservation Easement
    • Wildlife Management Associations Landowners workingtogether underguidance of a biologist Large area undersame generalmanagement Lessens the effect offragmentation 10 in middle basin for95,000 acres
    • Texas Land Trends IRNR