harris galveston subsidence district

9 were here. Created by the Texas Legislature in 1975 to stop further subsidence in the Houston-Galveston region. Since the creation of the GMA, HGSD has provided information, research, and financial support to the GMA process. The Harris-Galveston Subsidence District maintains GPS monitoring stations in Harris, Galveston, Fort Bend and surrounding counties. Harris-Galveston Subsidence District wishes you and your loved ones a safe and happy holiday season! sOsOg_oW uMfM "F6H1#]Q]9gv3] m ]:U3*~=lrz&/tU=j4VRi/Y?Qk#mLiQ&~9zOo,6L#?~"|HJ@uF~[L iaG,):LUCB$\zB+B=zT& Population projections were developed at the census block level for each decade from 2010 to 2070 using the 2010 U.S. Census as a population baseline. Get the latest news and updates from the Harris-Galveston Subsidence District. This report, prepared by the U.S. Geological Survey in cooperation with the Harris-Galveston Coastal Subsidence District, documents and refines the locations of principal faults mapped in the Houston, Texas, metropolitan area in previous studies. Elections Field inspector Robert Loveland sets up GPS monitoring site P013 that delivers data on land subsidence, or the sinking of land surface, to the Harris-Galveston Subsidence District, Tuesday . In 2001, the Texas legislature created the West Harris County Regional Water Authority (the Authority) to, among other things, reduce groundwater usage in, and to provide surface water to, the western portion of Harris County and a small portion of Fort Bend County. <>stream each regional water-level altitude map. (3) "District" means the Harris-Galveston Subsidence District. When we pump large amounts of groundwater from the aquifers beneath us, we pull water out of the many layers of clay, which can cause the clay to compact. feet of subsidence had occurred in the Houston-Galveston region. The District office will be closed on Monday, February 20, 2023, in observance of Presidents Day and will reopen during regular business hours on Tuesday, February 21, 2023. Creation year: 2003 (approved by Brazoria County voters in 2005). For the Jasper aquifer, primarily used in Montgomery County, water levels have continued to decline with development in the area., Click here to read our blog about how it could be addressed with a new USGS subsidence mapping tool, first published water-level altitude maps, The Harris-Galveston Coastal Subsidence District, The Lone Star Groundwater Conservation District, The Brazoria County Groundwater Conservation District, Its time for a water session at the Legislature, Texas is Losing an Average of Over 50 Gallons of Water Per Connection Every Day, Key Solutions to Texas Water Woes Are Simpler Than We Think. This district was created because area residents and local governments were becoming increasingly alarmed by subsidences continued impact on the regions economic growth and quality of life. In 2021, kriging, a geostatistical interpolation method, was The cumulative compaction in the Chicot-Evangeline undifferentiated aquifer is measured at 13 In addition to regulation, the district also conducts research to enhance its understanding of the Upper Gulf Coast aquifer to better manage subsidence. 218 0 obj <>/Filter/FlateDecode/ID[<47E07B46D706934486CB2062ED92DA88><05048E564C3EFD429B1933026D915C3D>]/Index[186 44]/Info 185 0 R/Length 144/Prev 850166/Root 187 0 R/Size 230/Type/XRef/W[1 3 1]>>stream All Rights Reserved It has since been turned into the Baytown Nature Center. The Harris-Galveston Subsidence District (HGSD) is a special purpose district created by the Texas Legislature in 1975. By Vanessa Holt. Subsequent to establishing the Harris-Galveston Subsidence District, the Texas State Legislature These units operate in conjunction with the two that have been monitoring land levels in Montgomery County for more than 10 years. However, there is another cause of subsidence in our area which causes the activation of surface faults (which can damage roads, houses, and buildings), loss of wetlands and . Brazoria County Groundwater Conservation District, Datasets of water-level changes and altitudes in the Chicot, Evangeline, and Jasper aquifers. subarea, and area B. The districts vision is to manage the groundwater resources so that, in the near future, the amount of groundwater withdrawn from the Gulf Coast Aquifer is no more than the average annual effective recharge to the Gulf Coast Aquifer System. The Subsidence District has adopted regulations requiring reduction of groundwater withdrawals through conversion to alternate source water (e.g., surface water) in certain areas within the . The public hearing fulfills the requirements of the Districts enabling legislation, which states that the Board of Directors shall hold a public hearing to take testimony concerning the effects of groundwater withdrawals on the subsidence of land within the District during the preceding year. The districts mission is to control land subsidence and manage groundwater resources through regulation, conservation, and coordination with suppliers of alternative water sources to assure an adequate quantity and quality of water for the future. Click for extensometer stations in the 11-county area. While some of the duties and goals are similar to those of groundwater conservation districts, Harris-Galveston . larger image. The development of brackish groundwater resources has become a more common water management strategy in the State of Texas. Population projections were developed at the census block level for each decade from 2010 to 2070 using the 2010 U.S. Census as a population baseline. Purpose: To preserve, conserve and protect Montgomery Countys groundwater supplies. The primary aquifers in the Gulf Coast aquifer system in the Houston-Galveston region are the % Lone Star GCD is working with the Subsidence District to make the newer stations available online. 2017 Annual Groundwater Report Final Approved (Revised 2.0). HGSD Financial Information including Budgets, Annual Audits, and Financial Reports. https://lnkd.in/gkwTtcAZ. Deputy General Manager Fort Bend Operations, Now Hiring! GULF-2023 Model Development & USGS Partnership. A resident of the Houston area since 2011, Vanessa began working in community . HGSD has the goal of reducing the area to 20% reliance on groundwater by 2035 and managing water to promote . All Rights Reserved. Land subsidence occurs when large amounts of groundwater have been excessively withdrawn from an aquifer. users to view annual water-level altitudes, water-level changes over time, and historical time series of HGSD works closely with State and Federal agencies to foster collaboration and improve governmental efficiency. Harris-Galveston Subsidence District, the =*-SRIbI -|tdAl` Q ka+dzLp[fAh/tGp7=>>q[y,Nz Ma Prior to 1975, the withdrawal of groundwater from the Chicot-Evangeline aquifer was unregulated, and compaction data. Since 1990, the Fort Bend Subsidence District has regulated groundwater withdrawals and monitored subsidence in Fort Bend county. Click here to view information and publications from USGS about groundwater and subsidence on the Texas Gulf Coast. Damages roadways, bridges, building foundations, and other infrastructure. For non-emergency law enforcement matters, please contact the Harris County Sheriffs Office non-emergency line at (713) 221-6000. This dataset shows current-year (2015-2016) water-level changes for each aquifer, 5-year (2011-2016) water-level changes for each aquifer, long-term (1990-2016 and 1977-2016) water-level changes for the Chicot and Evangeline aquifers, and long-term (2000-2016) water-level changes for the Jasper aquifer. Harris-Galveston Subsidence Districts main mechanism of regulation is through its regulatory plan, with requirements laid out in the districts enabling legislation. regional water-level change maps. The U.S. Geological Survey prepared this dataset in cooperation with the HarrisGalveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District. The Harris-Galveston Subsidence District (District) is a special purpose district created by the Texas Legislature in 1975. For detailed information on the processing methodology, please refer to https://ascelibrary.org/doi/10.1061/%28ASCE%29SU.1943-5428.0000399. hmo0?:;T!AR~p!A+~g`e]rw>F "1T"@0D$L$!A!JyXUJsm\Ouu~o:p11G5r[U=w/ QdQUq] HGSD has the goal of reducing the area to 20% reliance on groundwater by 2035 and managing water to promote . 18-396 passed on March 28, 2018, the Board of Directors held the Annual Groundwater Hearing beginning at 2:30 p.m. on May 23, 2018. Available job opportunities with Harris-Galveston Subsidence Distrcit. Removing water from fine-grained aquifer sediments compresses the aquifer leaving less pore space Report Street Light Outage The U.S. Geological Survey (USGS) prepared this dataset in cooperation with the HarrisGalveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District. City In order to evaluate the performance of the projection methodology which informed the 2013 DRP, the short-term projections from the RGUP have been evaluated against recent estimates of population and water demand from multiple sources at various geographic scales. H\j@}l/6 6i!i$U6"o=B9|c7MfwzQCyaks,Oi&LOcuVcc6_z0Y.MTQM>lW~2Miu8hV4c:ul:fU,+?/Q_spA.%Y[Hliicc-iiiiooo#t8zAG#+0SL W`y$[yzzxzzzxzzzxzzzxzzzxzzzxzzzxzgJ0Fi6xN4._3I]8o Subsidence can be an important issue in certain areas such as the Gulf Coast region. You can also view water levels by visiting the Lone Star Static Well Level Monitoring Network Map. Now hiring a Deputy General Manager for Fort Bend Operations. 4Rw,De@5hfbHY`b`H=n We I$@g|0 The Harris-Galveston Subsidence District is a special purpose district created by the Texas Legislature in 1975. The Fort Bend Subsidence District was created by the Texas Legislature in 1989 as a conservation and reclamation district (Act of May 26, 1989, 71st Leg., R.S., ch. 2001: Established by the Texas State Legislature. The Authoritys GRP sets forth the Authoritys plan to comply with the Subsidence District regulations, construct surface water facilities, and convert users from groundwater to alternate source water (e.g., surface water). The GULF-2023 model is a new $588,000 endeavor jointly funded by the HGSD and FBSD, in cooperation with USGS. 186 0 obj <> endobj The District enjoyed visiting the Houston Museum of Natural Science at Sugar Lands newest attraction, Ocean Bound: A Deep Dive Into the Science of How Water Flows. This interactive exhibit provides a look into how actions on land can impact water and even has an area designated for learning more about groundwater and subsidence. geographic information system (GIS) and used for the construction of regional water-level altitude and This study provides a basis for future research on subsidence in the Districts area and can inform water managers and planners in the Houston area on the availability of brackish groundwater resources. Areas of the nature center show reminiscences of the neighborhood and serve as an important reminder of what subsidence can do. Purpose: To manage groundwater withdrawal and enforce groundwater regulation throughout Harris and Galveston counties, in hopes of preventing the land subsidence that leads to increased flooding.. The new intake pump station will draw water from Lake Houston and, upon completion of the water treatment facility, will be able to provide 320 million gallons of treated water per day. Creation year: 1975 (64th Texas Legislature). available to store water resulting in the lowering (sinking or settling) of the land-surface. Additionally, the US Geological Survey (USGS) has begun work on the GULF-2023 model, with an anticipated completion date in the fall of 2021. Water Conservation Program Coordinator, 2022 Annual Groundwater Report Public Hearing Notice, https://ascelibrary.org/doi/10.1061/%28ASCE%29SU.1943-5428.0000399. On our last stop, we toured theCity of Houstons Northeast Water Purification Plant Expansion. University of Houston . interprets groundwater-level and aquifer-sediment-compaction data to understand the effects of below the land surface due to groundwater withdrawals. We look forward to each Directors contribution to the HGSDs Board. V(&xH:1dxB0"5Cu)edL9x2Z~Q`&1R`oC1NTEGxfP8QMiuy6T8-%HI Y{*,t wBh# Creation year: 2001 (77th Texas Legislature). If you are a leader with a passion for executing projects that improve our local communities, check out this opportunity! v24Wf\+p7Ak@Q(lCJ'$6(kKa FdbT41l1Y$k@*nx(7TK6A9. LX 0o9 'c* _Kq3b2'T9I?. In cooperation with Harris-Galveston Subsidence District, the City of Houston, Fort Bend County Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District, the U.S. Geological Survey Texas Water Science Center Gulf Coast Program collects, processes, and interprets groundwater-level . }D?|=X'W|pqe'p]x/ Since it is not a GCD, HGSD participates in the activities of GMA 14 as an inter-local participant. resulting in subsidence. Harris-Galveston Subsidence District Permitting Portal Fort Bend Subsidence District Permitting Portal Please use one of these links to reach to the appropriate Permitting Portal. reduce groundwater withdrawals in Harris and Galveston Counties. If you are passionate about water conservation, education, collaboration, and making a positive impact on your community, we invite you to apply today! The data is temporarily stored in an on-site monitor and periodically uploaded to computers at the Harris Galveston Subsidence District. Harris County Sheriffs Office historical year or as the difference in water-level altitude at each well for the water-level data Learn about Land Subsidence in Houston, Galveston and surrounding areas. Bandera County River Authority & Groundwater District Featured District, Develop population and demand projections for 10 counties through 2100, Conduct alternative water supply assessment, Develop the Gulf Coast Land Subsidence and Groundwater Flow (GULF)-2023 model with US Geological Survey and Texas Water Development Board, Update the analytical subsidence models previously used by the HGSD and FBSD, Groundwater regulation (or lack thereof) in adjacent counties. Providing analysis of accurate and up to date predictions on water usage; the enforcement of real disincentives to those who rely too heavily on groundwater; and an unwavering commitment to practicing and promoting water conservation. Pay Your Tax Bill Online A report by: David B. Zilkoski, Lucy W. Hall, Gilbert J. Mitchell, Vasanthi Kammula, Ajit Singh, William M. Chrismer, and Ronald J. To address the issues associated with land-surface subsidence and compaction, the 64th Texas State Chicot-Evangeline aquifer in southeastern Harris County, and correspondingly, by 1979, as much as 10 USGS measures groundwater levels in over 700 wells in an 11-county area annually in the Numerous subsurface faults have been documented beneath the Houston metropolitan area at depths of 3,200 to 13,000 feet. Click here for more information about the Authority. Lone Subsidence Risk Assessment and Regulatory Considerations for the Brackish Jasper Aquifer. The District was created to provide for the regulation of groundwater withdrawal throughout Harris and Galveston counties for the purpose of preventing land subsidence, which leads to increased flooding. xX6~R-N\dq?%cBa:77#KZO=~`[h[VPC-!q8cVBv1j0Bh}vcu-7~6G~@ ucM,-s-9i4_g8jO00J\iOSktweZ.wfbuy9;Q^WGeQUab=~2_GK Z/fox$mTLMNX/ke5'a(7X=NCi>26*'$!3 The University of Houston processes the GPS data. On the first stop, we visited the Texas City Rainwater Pump Station, where Texas Citys Emergency Management team takes runoff rainwater from ditches in the area and pumps it into Moses Lake. Information about the report can be found at the Harris-Galveston Subsidence District website. Fort yV'1p s$&:j},WF") ]WdO9mu]eh+5K[1T@sPdQ$j%j\\u)) ->qT?^R:@RY!cpu)88p/~p]7 WEWj$U$e'I|MVfgyUcgwy~h8qZ hK}&EiQ';[P2 =Yal For almost 50 years, they have been collecting, storing, and sharing data on groundwater abstraction and resulting surface lowering. 229 0 obj <>stream The results of this study confirm the potential for compaction in the Jasper aquifer and subsidence to occur from brackish groundwater development particularly in up-dip areas near where the Jas-per is being used for freshwater supply. Water, For persons with questions or needing help regarding website accessibility, or to request the provided information in alternative formats, please call (713) 860-6400 or send an email to, Harris County Municipal Utility District 501, 10000 Towne Lake Parkway, Cypress, Texas 77433. The model will simulate the impacts of groundwater use on aquifer water levels and land subsidence throughout the region and will be used to evaluate regulatory scenarios of interest to both subsidence districts. This district was created because area . %PDF-1.3 Water-level altitude, well, and compaction data have been combined in an interactive map that allows SMU is developing subsidence maps from 1992 to 2023 by integrating data obtained from multi-temporal Interferometric Synthetic Aperture Radar (InSAR), a remote sensing technique using data collected from orbiting satellites, to quantitatively evaluate subsidence over specific periods of time across the region. 301 Jackson Street, Suite 639 zAG2U&8?fU@. Land subsidence is the gradual lowering of land-surface elevation. This button displays the currently selected search type. Southeast Texas Groundwater Conservation District; Other Districts. Significant brackish groundwater resources exist within the Gulf Coast Aquifer System near Houston, Texas in Harris, Galveston, Fort Bend, and surrounding counties. Water-level change in the Gulf Coast Aquifer, 1977 to 2018. The Harris-Galveston Subsidence District, in cooperation with the Fort Bend Subsidence District, the Brazoria County Groundwater Conservation District, the Lone Star Groundwater Conservation District, the University of Houston, and the Brazosport Water Authority maintains a subsidence monitoring network that is constantly evolving and requires consistent investment. After successfully implementing InSAR mapping in the Houston-Galveston region in 2019, this new project will harness the complimentary capabilities of the Subsidence Districts subsidence monitoring network and SAR imagery to develop these historical deformation maps. SMU is developing subsidence maps from 1992 to 2023 by integrating data obtained from multi-temporal Interferometric Synthetic Aperture Radar (InSAR), a remote sensing technique using data collected from orbiting satellites, to quantitatively evaluate subsidence over specific periods of time across the region. Extensometers and Subsidence. The Houston area's two subsidence districts the Harris-Galveston Subsidence District, HGSD, and the Fort Bend Subsidence District have worked to monitor subsidence and mitigate it through a variety of water management efforts. The Lone Star Groundwater Conservation District in 2012 purchased six Periodically Accessible Monitors (PAMs), which are specifically designed to detect subsidence. When expanded it provides a list of search options that will switch the . Get regular updates on Lone Star Groundwater Conservation District. Harris-Galveston Subsidence District. When expanded it provides a list of search options that will switch the search inputs to match the current selection. hbbd```b``NA$EHD]c@$wX2$'u1fHY b If the elevation of your house is only 10 feet above sea-level and you lose 10 feet of elevation because of subsidence, your house is now under water. We are hiring a Deputy General Manager Fort Bend Operations to join our executive leadership team. Subsidence is known to have occurred in the southern part of Montgomery County based on monitoring and long-term surveying of land surface. Removing water from fine-grained aquifer sediments compresses the aquifer leaving less pore space available to store water resulting . She joins Harris County from the Harris-Galveston Subsidence District, where she has served as Deputy General Manager for the past 3 years and oversaw the District's Regulatory Planning, Scientific Research, and Water Conservation Programs. These sites are being cooperatively run and operated by the following agencies. Both surface water and groundwater rates were reduced by $0.50 per 1,000 gallons. water for municipal supply, commercial and industrial use, and irrigation in the Houston-Galveston The Authority has developed a groundwater reduction plan (GRP) and obtained Subsidence District approval of its GRP. HGSD lies within the boundaries of Groundwater Management Area 14 (GMA 14). of Houston, HGSD conducts regulatory planning on a regular basis to confirm that adopted regulations have reduced subsidence rates. For more information, or to learn how to submit your report online, visit: https://lnkd.in/gSz5XemV. The live data from the two older PAM units may be viewed by clicking on the Subsidence Monitoring Network Map (If you have Google Earth installed on your computer, simply click on the .kml file, and Google Earth will automatically open, showing you the network map.). Field inspector Robert Loveland sets up GPS monitoring site P013 that delivers data on land subsidence, or the sinking of land surface, to the Harris-Galveston Subsidence District . Bend County Subsidence District, Evaluation of projected population and future water demands, Development of subsidence models to simulate future subsidence based on projected water demands, Measurement of annual water-level to show the impact of conversion requirements on the water-level in the aquifer, Assessment of alternative water supplies including brackish groundwater use and aquifer storage and recovery. Grant opportunities to implement projects that help reduce water use in the HGSD Regulatory Areas. #Hiring Disrupts collector drains and irrigation ditches. For keyboard navigation: First, use Arrow Keys to navigate up and down the districts. The water-level measurements in the dataset are built upon and stored in the National Water Information System: web interface, groundwater information, and field measurements website located here: http://dx.doi.org/10.5066/F7P55KJN. Over the last century, aquifers in this area have lost between 300 and 400 feet, leaving some of the land to collapse. Brazoria County Groundwater Conservation District . Overview of the Harris-Galveston Subsidence District planning process. https://lnkd.in/g-6YkVmS She earned her Bachelor's degree in Biology and Environmental Studies from Baylor University and her . Managing how groundwater resources are used is key to controlling subsidence. Since its creation, subsidence rates have slowed greatly. Groundwater Conservation District Information (O-Z and Subsidence Districts) For keyboard navigation: First, use Arrow Keys to navigate up and down the districts. Learn about the District's water conservation programs and tools, Get local watering recommendations based off data from the District's weather stations. When we pump large amounts of water from the aquifers beneath us, we pull water out of the many layers of clay, which causes the clay to compact, lowering the elevation of the land above. Groundwater Conservation District and, most recently, Brazoria County Groundwater Conservation District From USGS well monitoring over decades they are able to show that once subsidence districts are created, groundwater levels rise significantly, thereby decreasing subsidence issues in their districts. publication. Types of research sponsored by the District include: Each year the Board of Directors holds a public hearing for the purpose of taking testimony concerning the effects of groundwater withdrawals on the subsidence of land within the District during the preceding year. Since the mid 1970s, the USGS and the Harris-Galveston Subsidence District have conducted scientific investigations and subsidence monitoring for over 40 years. Contact Information; District Website; Legislation House Bill 552; Chapter 284, 64th Legislature, 1975; Subsidence regulation districts and their creation timeline The Harris-Galveston Coastal Subsidence District. A focus of these scenarios will be on the variables that minimize subsidence in the future while accounting for the availability of alternative water supplies. The cumulative compaction in the Chicot and Evangeline aquifers are measured at 13 extensometer stations in the 11-county area. According to the Harris-Galveston Subsidence District (HGSD), land subsidence is the sinking of the earth's surface due to subsurface (underground) movements. Purpose: To manage groundwater withdrawal and enforce groundwater regulation within the district to prevent subsidence. The District uses exceptional scientific research to ensure the best available technology and approaches are considered with respect to water management and subsidence monitoring. =3R{;vBbh *J2q!Ol] 5rR(T/hgb(0XY g;}HcBei3Wbhq+(MH9DX0ayqQ^\I:v@|\S$N=fV(~'|Wo+p&O%b water-level altitude and regional water-level change contour map can be found in the individual year Newsletters Overview of Science and Research conducted by the Harris-Galveston Subsidence District, The strategic direction for science and research conducted at the Harris-Galveston Subsidence District. The District was created to provide for the regulation of groundwater withdrawal. These efforts have identified and documented the susceptibility of land surface subsidence due to the production of groundwater in the Chicot and Evangeline aquifers. The Board meetings are typically held at 5:30 PM on the first Wednesday of the month at The Lakehouse at Towne Lake, 10000 Towne Lake Parkway, Cypress, Texas 77433. J.M:xo[q]omJdI Wf@M|$ot-MB@V5J SDh!!FwTtd\#\v?T{DJo"DfTFaF.%I\J'3@$;k 8f The Harris-Galveston Subsidence District (HGSD) is a special purpose district created by the Texas Legislature in 1975. The Science and Research Plan is designed to be a dynamic document with the intention to provide clarity to the strategic direction of the District and guidance to future science and research priorities in support of the District Regulatory Plan. This study, spawned from their original research that showed subsidence in southern Montgomery County was caused by exploitation of the Jasper aquifer, will investigate the combined effects of climate changes on coastal subsidence to enhance understanding of the deformation process. Explore Groundwater-Level and Compaction Data in the Chicot, Evangeline and Jasper Aquifers. In the Houston-Galveston region, land subsidence is caused by compaction of fine-grained aquifer sediments (silts and clays) below the land surface due to groundwater withdrawals. Then, use either Enter or Space key to open the selected district. The district proactively works with its groundwater users to address issues such as how to most efficiently use groundwater, control and prevent waste, control and prevent subsidence, and address drought conditions. Star Groundwater Conservation District. The purpose of this report is to summarize the results of the Regional Groundwater Update Project (RGUP). Application for Groundwater Certificate Replacement, and Acknowledgment of District Regulatory Requirements. View More. o35d8\,=R/.Y2xTE@;jj?4/gh?D$U2;MrpF&tMF6h-|l-:nSzC~ ER5knSP" zXyY/mY|{mm}x"S8K~"UILrD> Up to 2020, regional water-level altitude maps were created by manually interpolating contours of endstream endobj 187 0 obj <>/Metadata 33 0 R/OCProperties<>/OCGs[219 0 R]>>/Outlines 37 0 R/PageLayout/SinglePage/Pages 184 0 R/StructTreeRoot 50 0 R/Type/Catalog>> endobj 188 0 obj <>/ExtGState<>/Font<>/Properties<>/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 189 0 obj <>stream In reaction to the subsidence issues across the Houston-Galveston region, the Texas Legislature established the first subsidence district in 1975 to reduce or minimize further groundwater subsidence in their area. Purpose: To maintain the quality and availability of Brazoria Countys groundwater resources for current users and future generations. This report, prepared by the U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District, is one in an annual series of reports depicting water-level altitudes and water . These data were used to develop a groundwater flow model capable of simulating subsidence to inform the subsidence risk of brackish development of the Jasper aquifer. This report, prepared by the U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District, is one in an annual series of reports depicting water-level altitudes and water . their jurisdiction. Interpolated modeled water-level altitude surfaces were only used to compute differences when wells were The RGUP was jointly supported by the Harris-Galveston Subsidence District, the Fort Bend Subsidence District, and the Lone Star Groundwater Conservation District. Register a well, permit applications, renewals, and amendments. By 1977, an extensive groundwater well-monitoring network had been established and the USGS had collected water-level data that were used to create the first published water-level altitude maps of the Chicot and Evangeline aquifers in the Houston-Galveston region.

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