for many of the remaining rivers which are already
<br />subject to a myriad of uses and are subject to a
<br />broad range of competing demands. Protection/
<br />development decisions can also not be resolved
<br />with a simple decision to "protect in its natural
<br />state" or "develop". Instead, more specific goals
<br />must be formulated for particular areas reflecting
<br />a broad range of factors including, in some
<br />instances, restoration of degraded river and
<br />adjacent corridor areas.
<br />- Many of the most suitable sites for dams and
<br />reservoirs and, to a lesser extent, other
<br />engineering works have already been utilized.
<br />Remaining sites often offer lower cost/benefit
<br />ratios or are unsuitable geologically or
<br />hydrologically for structural works. Existing
<br />residential, commercial, or industrial development
<br />has also effectively "preempted" many sites due to
<br />the high cost of land acquisition for developed
<br />areas. This means that alternative multiobjective
<br />approaches to flood loss reduction and erosion
<br />control may be particularly attractive.
<br />- Interest in rivers has broadened to include
<br />mid-size and small rivers, including creeks, and
<br />drainageways. Most of the floodplain mapping and
<br />river gauging, assessment, planning, and river
<br />management efforts in the U.S. in the 1960's-
<br />1980's addressed larger rivers and streams and
<br />adjacent lands. Most of the protection/development
<br />disputes also concerned these highly visible and
<br />heavily used water bodies. But, in the last decade
<br />interest has broadened to include the mid-size and
<br />smaller rivers, streams and creeks for a variety
<br />of reasons. First, much of the pollution from
<br />nonpoint sources is being carried into the larger
<br />rivers from urban runoff, stormwater, agricultural
<br />runoff and other sources along smaller rivers,
<br />streams and creeks. It is impossible to improve
<br />water quality on the larger rivers without
<br />addressing problems at their source. Second, many
<br />of the prime wetlands, wildlife areas, and habitat
<br />areas lie along smaller "feeder" rivers and
<br />streams. Third, it has been gradually recognized
<br />that much of the flood and "drainage" damage
<br />occurring in the U.S. is occurring adjacent to
<br />small and midsize rivers and streams which often
<br />lack floodplain maps, gauging, or regulations. In
<br />addition, increased runoff from small rivers and
<br />streams in urbanized areas is, collectively,
<br />greatly increasing flood peaks on larger rivers
<br />and streams. Fourth, public river-related
<br />recreation interests and needs have broadened to
<br />include rafting, kayaking, tubing and fishing in
<br />small creeks and rivers. In addition, the lands
<br />adjacent to small rivers and creeks is used
<br />increasingly for walking, hiking, birdwatching,
<br />nature watching, jogging, etc.
<br />- Interest in river protection and restoration
<br />has broadened from primarily a rural orientation
<br />to one that includes urban and urbanizing rivers
<br />and streams. At one time there was,little interest
<br />in urban rivers and streams except for development
<br />purposes (warehouses, docks, ports). However, with
<br />improved water quality in the nation's rivers and
<br />shifting public needs, interest has shifted in
<br />cities across the nation to restoration of
<br />waterfronts and protection of undeveloped areas,
<br />restoration of historic buildings and "heritage"
<br />areas, providing parks and walking areas, and
<br />enhancing the economic values of riverfront areas
<br />for commercial and residential use. In the last
<br />twenty years many of the most innovative river and
<br />river corridor restoration efforts have been in
<br />the cities (Rusler 1982b; NPS, in press; Riley, in
<br />press). It is now rare for a large or mid-size
<br />city not to have some sort of river and stream
<br />waterfront protection, restoration, or management
<br />plan.
<br />- The constituencies for river corridor protec-
<br />tion, restoration, and management have broadened.
<br />At one time, the major proponents of river
<br />management were navigational interests (barge
<br />traffic, etc.), commercial and industrial
<br />developers, and boaters, and flood loss reduction
<br />planners and engineers. Engineering approaches
<br />such as dredging and construction of dams were
<br />often favored by these groups. In the 1960's and
<br />1970's, the number of fishermen and nonpower boat
<br />(canoe, raft, sailboat) river recreational users
<br />favoring free-flowing streams and open, vegetated
<br />floodplains increased. In the 1980s these groups
<br />were joined by many others: birdwatchers; joggers;
<br />kayakers; rafters; "tubers"; and owners of stores,
<br />motels, hotels, and shops desiring an attractive
<br />nearby river or stream environment; residential
<br />subdividers and developers also desiring an
<br />attractive environment for residents, etc.; and
<br />specialists in nonstructural flood and erosion
<br />loss measures. Collectively, these groups have
<br />substantial political clout at all levels of
<br />government.
<br />- Legislative and other government management
<br />goals for rivers and adjacent lands have
<br />broadened. At one time, the legislative goals
<br />contained in programs for management of rivers or
<br />stretches of river were often a single objective
<br />or limited to several objectives. For example,
<br />channelization was carried out for tens of
<br />thousands of miles of smaller creeks with the
<br />legislative objectives of draining land with
<br />agricultural potential and reducing flood losses.
<br />Dams were often constructed on larger rivers for a
<br />single principal legislative objective: flood
<br />control, navigation, or hydropower. Due to
<br />broadened public interests and concerns, the
<br />legislative goals for river and adjacent river
<br />corridor management have broadened.
<br />- New federal, state, and local regulations
<br />have been adopted which codify these goals and
<br />provide new, tougher standards for water and
<br />shoreland uses. These new objectives have, to a
<br />greater or lesser extent, been codified in various
<br />regulatory requirements which act as restraints on
<br />traditional engineering projects. These regula-
<br />tions include federal, state, and local wetlands
<br />regulations including the "no net loss standard",
<br />state and federal instream flow requirements,
<br />state and federal nonpoint source pollution
<br />control requirements, state and federal stormwater
<br />requirements (e.g. a recent E.P.A. requirement
<br />that cities over 100,000 population prepare
<br />stormwater management water quality plans), state
<br />and local floodplain regulations, state and local
<br />special "stream and local" river controls, and
<br />various comprehensive zoning and planning
<br />regulations with natural resource management
<br />components.
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