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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This layer is intended to provide estimates of nonpoint sources on the subwatershed level. These include estimates of livestock agriculture (such as livestock numbers and manure land-application area), the number of on-site septic systems, lost wetland, natural riparian buffers, and the amount of land that is covered by impervious surfaces. Each nonpoint source indicator (or stressor) is given a category based on how the subwatershed compares with all other subwatersheds in the entire state (e.g. a subwatershed that is marked as "high" for impervious surfaces would have a high amount of impervious surface relative to the state median value). </SPAN></P><P><SPAN>Land cover (NOAA, 2011), population and housing unit data (US Census Bureau, 2010 and 2012), agricultural census data (USDA, 2014), lost wetland (Fizzell, 2015), and septic system information are summarized for each 12-digit HUC level subwatershed in Michigan. The number of hogs and cattle, and the percent of agricultural land that has manure land-applied or tiled, are estimates derived from county-based agricultural census data. These county-level data were then distributed geographically across all agricultural land cover in that county (assuming even distribution or impact of the livestock across agricultural land), then intersected with subwatersheds to obtain a population estimate. The number of septic systems are estimates and should also be verified locally. Septic systems were estimated by determining the number of housing units in census blocks that were served by sanitary sewers, and assuming that the remainder relied on residential septic systems. The number of housing units served by sanitary sewers was estimated from permit applications on file in EGLE's MiWaters database and files (collection system maps, shapefiles where available from the permittee, and/or estimates of population served). Natural riparian buffer coverage is a percent of stream miles with a 30 meter natural vegetation buffer, and was created by buffering the stream hydrography layer and intersecting the buffer with forested and wetland 2011-era land cover.</SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN>This dataset is a public record and, as more fully described below, there are no restrictions on the use, reproduction, or distribution of this dataset. Notwithstanding the foregoing, the public release of this dataset should not be construed, expressed or implied, as to whether any use constitutes a legally permissible purpose. It is the sole responsibility of the user to determine if the data is usable for their purposes. This dataset is provided “AS IS” and on an “AS AVAILABLE” basis. The Michigan Department of Environment, Great Lakes, and Energy (hereinafter referred to as EGLE) makes no warranties, express or implied, regarding the accuracy, adequacy, reliability, timeliness, or completeness of this dataset. EGLE also does not make any warranties, express or implied, for the continued quality, accuracy, or currency of this dataset after it has been downloaded, nor the quality or accuracy of any analyses or re-uses of this dataset. EGLEDISCLAIMS ALL WARRANTIES WITH REGARD TO THIS DATASET AND ANY INFORMATIONPROVIDED TO YOU, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF PROPRIETARYRIGHTS. THE STATE WILL NOT BE LIABLE, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR BY STATUTE OROTHERWISE, FOR ANY CLAIM FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT, ORSPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION LOST PROFITS AND LOSTBUSINESS OPPORTUNITIES, RELATED TO THE ACCESS OR USE OF THIS DATASET. IN NOEVENT WILL EGLE BE LIABLE FOR ANY AMOUNTS THAT MAY RESULT FROM THEACCESS OR USE OF THIS DATASET, REGARDLESS OF THE FORM OF ACTION, WHETHERIN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR BY STATUTE OR OTHERWISE. You forever release EGLE, its divisions, officers, and employees from all claims, rights, actions, demands, damages, liabilities, expenses and fees, which arise out of or relate to your access or use of this dataset. You must defend, indemnify and hold EGLE, its divisions, officers, and employees harmless, without limitation, from and against all actions, claims, losses, liabilities, damages, costs, attorney fees, and expenses (including those required to establish the right to indemnification) arising out of or relating to your access or use of this dataset. EGLE reserves the right to modify or remove this dataset for any reason, without notice, at any time. Nothing in these terms constitutes or is intended to be a limitation upon, or waiver of, any privileges and immunities that apply to EGLE. These terms are governed by and interpreted under the laws of the State of Michigan without regard to conflict of laws provisions. These terms do not apply to other materials or content, including maps or logos, that may be located on the site or portal containing this dataset and that may be protected by intellectual property rights such copyright, trademark, or patent. Nothing in these terms should be construed, expressed or implied, as impacting any existing rights or licenses in such materials or content, if any.</SPAN></P></DIV></DIV></DIV> |