Areas of land use change in the China Lake watershed from 1965 to
	2003.  Positive land use change, which may decrease phoshorus loading, is defined as the
	change from developed land including residential, commericial/municipal, and agricultural
	to undeveloped land, including forest, wetlands, and reverting land.  Negative land use
	change, which may increase phosphorus loading, is defined as undeveloped land changing
	to developed land.  Neutral land use change, which causes little if any change in phosphorus
	loading is defined as a change of land use type within either the broader developed or
	undeveloped category