DEVELOPMENT OF LOCAL DROUGHT TRIGGER LEVELS PREPARED BY THE HILL COUNTRY UNDERGROUND WATER CONSERVATION DISTRICT.

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Presentation transcript:

DEVELOPMENT OF LOCAL DROUGHT TRIGGER LEVELS PREPARED BY THE HILL COUNTRY UNDERGROUND WATER CONSERVATION DISTRICT

STATUTORY REQUIREMENTS FOR DROUGHT MANAGMENT  TEXAS WATER CODE Sec Management Plan (a) Following notice and hearing, the District shall, in coordination with surface management water entities on a regional basis, develop a comprehensive management plan which addresses the following goals, as applicable: (a) Following notice and hearing, the District shall, in coordination with surface management water entities on a regional basis, develop a comprehensive management plan which addresses the following goals, as applicable: (6) addressing drought conditions (6) addressing drought conditions TEXAS WATER DEVELOPMENT BOARD RULES TEXAS WATER DEVELOPMENT BOARD RULES Chapter Groundwater Management Required Content of Management Plan Chapter Groundwater Management Required Content of Management Plan (a) The executive administrator shall certify a management plan as administratively complete if it uses a planning period of at least ten years and contains the following: (a) The executive administrator shall certify a management plan as administratively complete if it uses a planning period of at least ten years and contains the following: (1) management goals,as applicable (1) management goals,as applicable (F) addressing drought conditions (F) addressing drought conditions

DROUGHT MANAGEMENT PLAN COMPONENTS  TRIGGER CONDITIONS  DROUGHT MANAGEMENT STATEGIES

TRIGGER CONDITIONS  GROUNDWATER LEVEL DECLINES  RAINFALL  SPRING DISCHARGE  STREAM AND RIVER FLOW  SOIL MOISTURE  PALMER DROUGHT INDEX  PUMPAGE AND DISTRIBUTION CAPACITIES

PALMER DROUGHT INDEX  Developed by Wayne Palmer of the U.S. Department of Commerce Weather Bureau in 1965  Focuses on rainfall and soil moisture  Setup on a scale of -5 to 5. The greater the negative number the more intense the drought  Prepared weekly by NOAH  The index is calculated for broad areas which may not be represented of local conditions

ELLENBURGER AQUIFER WATER LEVELS SEPTEMBER 1, 2004

DEVELOPMENT OF A LOCAL DROUGHT INDEX BASED ON:  Palmer Hydrological Drought Index  Aquifer Water Levels from two City of Fredericksburg Ellenburger Monitor Wells  Stream Flow from the Pedernales River at the LCRA gauge site south of Fredericksburg  Rainfall for the previous 10 month total as recorded at Lady Bird Johnson Municipal Park

LOCAL DROUGHT INDEX DATA BASE

LOCAL DROUGHT INDEX REGRESSION REPORT

COMPARISON OF THE PHDI AND THE CALCULATED LOCAL DROUGHT INDEX

COMPARISON OF THE LOCAL DROUGHT INDEX AND THE HAHN TEST WELL #1 WATER LEVELS

COMPARISION OF THE LOCAL DROUGHT INDEX AND THE KNAUTH# 1 WATER LEVELS

COMPARISON OF THE LOCAL DROUGHT INDEX TO THE PEDERNALES RIVER FLOW

COMPARISON OF THE LOCAL DROUGHT INDEX AND THE PREVIOUS 10 MONTH RAINFALL TOTALS