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<br /> <br />(.oJ <br />J-O. <br />o <br />o <br /> <br />PREFACE <br /> <br />This report was prepared to review the literature on diffuse-source <br />salinity associated with the Mancos Shale geologic formation. The Bureau <br />of Land Management administers over one million of acres of saline soils <br />within the upper basin states of the Colorado River drainage. The primary <br />geologic formation associated with these saline soils is the Mancos <br />Shale. The Mancos Shale and associated saline soils contribute dissolved <br />solids to the Colorado River Basin, adding to the water quality problems <br />of the River. Salt loading mechanisms include surface runoff and erosion, <br />interflow, shallow ground water flow through streambed alluvium, and deep <br />ground water flow. <br /> <br />The high salt loads of the Colorado River adversely affect more than 12 <br />million people and over one million acres of irrigated land. This report <br />emphasizes relationships between salt loading mechanisms and landforms <br />within Mancps Shale regions, and reviews recent runoff, erosion, and <br />salinity st~dies on Mancos Shale. It is intended to provide specialists <br />and land managers information for use in land use planning, project <br />design, and; environmental assessment on Mancos shale. <br /> <br /> <br />, <br />, <br />, <br />, <br />; <br />;! <br /> <br />; <br /> <br />J <br /> <br />; <br />'~ <br /> <br />; <br />:~ <br />-'q <br />,i <br />-~ <br />'! <br /> <br />i <br />,:1 <br />1 <br />; <br /> <br />;- <br />.j <br /> <br />i <br />j <br />1 <br /> <br />-:\ <br />J <br /> <br />, ;,,/"~ <br /> <br />